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Current Electricity

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2026
The equivalent resistance between the points $A$ and $B$ in the following circuit is $\frac{x}{5} \Omega$. The value of $x$...
JEE Main Physics Hard
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Q JEE MAIN 2026
For the two cells having same EMF $E$ and internal resistance $r$, the current passing through the external resistor $...
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Q JEE MAIN 2026
In the potentiometer, when the cell in the secondary circuit is shunted with $4 \Omega$ resistance, the balance is obtained...
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Q JEE MAIN 2026
JEE Main Physics Hard
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Q JEE MAIN 2026
A moving coil galvanometer of resistance $100 \Omega$ shows a full scale deflection for a current of 1 mA ....
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Q JEE MAIN 2026
A regular hexagon is formed by six wires each of resistance $r \Omega$ and the corners are joined to the...
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Q JEE MAIN 2026
Two resistors $2 \Omega$ and $3 \Omega$ are connected in the gaps of bridge as shown in figure. The null...
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Q JEE MAIN 2026
Two resistors of $100 \Omega$ each are connected in series with a 9 V battery. A voltmeter of $400 \Omega$...
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Q JEE MAIN 2026
A wire of uniform resistance $\lambda \Omega / \mathrm{m}$ is bent into a circle of radius $r$ and another piece...
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Q JEE MAIN 2026
A cylindrical conductor of length 2 m and area of cross-section $0.2 \mathrm{~mm}^2$ carries an electric current of 1.6 A...
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Q JEE MAIN 2026
A meter bridge with two resistances $\mathrm{R}_1$ and $\mathrm{R}_2$ as shown in figure was balanced (null point) at 40 cm...
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Q JEE MAIN 2026
The heat generated in 1 minute between points $A$ and $B$ in the given circuit, when a battery of $...
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Q JEE MAIN 2026
Two known resistances of $R \Omega$ and $2 R \Omega$ and one unknown resistance $X \Omega$ are connected in a...
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Q JEE MAIN 2026
A battery with EMF $E$ and internal resistance $r$ is connected across a resistance $R$ The power consumption in $R$...
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Q JEE MAIN 2026
The total length of potentiometer wire AB is 50 cm in the arrangement as shown in figure. If P is...
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Q JEE MAIN 2020
Consider four conducting materials copper, tungsten, mercury and aluminium with resistivity $\rho \mathrm{c}$,
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Q JEE MAIN 2020
A potentiometer wire $P Q$ of $1 m$ length is connected to a standard cell $E_1$. Another cell $E_2$ of...
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Q JEE MAIN 2019
A galvanometer of resistance $100 \Omega$ has 50 divisions on its scale and has sensitivity of $20 \mu \mathrm{~A} /$...
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Q JEE MAIN 2019
The resistive network shown below is connected to a D.C. source of 16 V. The power consumed by the network...
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Q JEE MAIN 2019
In the given circuit the internal resistance of the 18 V cells is negligible. If $\mathrm{R}_1=400 \Omega, \mathrm{R}_3=100 \Omega$ and...
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Q JEE-MAIN 2019
Two electric bulbs, rated at (25 W, 220 V) and (100 W, 220 V), are connected in series across a...
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Q JEE-MAIN 2019
An ideal battery of 4 V and resistance R are connected in series in the primary circuit of a potentiometer...
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Q JEE MAIN_2019_
A current of 5 A passes through a copper conductor (resistivity $=1.7 \times 10^{-8} \Omega \mathrm{~m}$ ) of radius of...
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Q JEE MAIN_2019_
In a meter bridge experiment, the circuit diagram and the corresponding observation table are shown in figure
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Q JEE-MAIN 2019
In a meter bridge, the wire of length 1 m has a nonuniform cross-section such that, the variation $\frac{\mathrm{dR}}{\mathrm{dl}}$ of...
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Q JEE MAIN 2019
The galvanometer deflection, when key $K_1$ is closed but $K_2$ is open, equal $\theta_0$ (see figure). On closing $K_2$ also...
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Q JEE-MAIN 2019
In the figure shown, a circuit contains two identical resistors with resistance $\mathrm{R}=5 \Omega$ and an inductance with $\mathrm{L}=2 \mathrm{mH}$....
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Q JEE MAIN_2019_
In the given circuit, an ideal voltmeter connected across the $10 \Omega$ resistance reads 2 V. The internal resistance r,...
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Q JEE MAIN_2019_
A moving coil galvanometer allows a full scale current of $10^{-4} \mathrm{~A}$. A series resistance of $2 \mathrm{M} \Omega$ is...
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Q JEE MAIN 2020
A galvanometer of resistance G is converted into a voltmeter of range 0 – 1 V by connecting a resistance...
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Q JEE MAIN 2019
A moving coil galvanometer has resistance $50 \Omega$ and it indicates full deflection at 4 mA current. A voltmeter is...
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Q JEE MAIN 2019
In the given circuit diagram, the currents, $\mathrm{I}_1=-0.3 \mathrm{~A}, \mathrm{I}_4=0.8 \mathrm{~A}$ and $\mathrm{I}_5=0.4 \mathrm{~A}$, are flowing as shown. The currents...
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Q JEE MAIN 2019
A galvanometer, whose resistance is 50 ohm , has 25 divisions in it. When a current of $...
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Q JEE MAIN 2019
A moving coil galvanometer, having a resistance G , produces full scale deflection when a current Ig flows through it....
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Q JEE MAIN_2019
In an experiment, the resistance of a material is plotted as a function of temperature (in some range). As shown...
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Q JEE MAIN 2020
In the figure shown, the current in the 10 V battery is close to
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Q JEE MAIN 2020
A circuit to verify Ohm’s law uses ammeter and voltmeter in series or parallel connected correctly to the resistor. In...
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Q JEE MAIN 2020
In the given circuit diagram, a wire is joining points B and D. The current in this wire is:
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Q JEE MAIN 2019
The resistance of the metre bridge AB in given figure is $4 \Omega$. With a cell of emf $\varepsilon=0.5 \mathrm{~V}$...
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Q JEE MAIN 2020
Four resistances of $15 \Omega, 12 \Omega, 4 \Omega$ and $10 \Omega$ respectively in cyclic order to form Wheatstone's network....
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Q JEE MAIN 2020
A galvanometer is used in laboratory for detecting the null point in electrical experiments. If, on passing a current of...
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Q JEE MAIN 2020
An electrical power line, having a total resistance of $2 \Omega$, delivers 1 kW at 220 V . The efficiency...
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Q JEE MAIN 2019
In a Wheatstone bridge (see fig.), Resistances P and Q are approximately equal. When R $=400 \Omega$, the bridge is...
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Q JEE MAIN 2019
Two equal resistances when connected in series to a battery, consume electric power of 60 W. If these resistances are...
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Q JEE MAIN 2019
In the circuit shown, the switch $S_1$ is closed at time $t=0$ and the switch $S_2$ is kept open. At...
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Q JEE-MAIN 2020
SOLVE this
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Q JEE MAIN 2020
The length of a potentiometer wire is 1200 cm and it carries a current of 60 mA . For a...
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Q JEE Main 2019
A potentiometer wire $A B$ having length $L$ and resistance $12 r$ is joined to a cell $D$ of emf...
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Q JEE Main 2019
A uniform metallic wire has a resistance of $18 \Omega$ and is bent into an equilateral triangle. Then, the resistance...
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Q JEE Main 2019
A 2 W carbon resistor is color coded with green, black, red and brown respectively. The maximum current which can...
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Q JEE Main 2019
In the given circuit the cells have zero internal resistance. The currents (in amperes) passing through resistance $R_1$ and $R_2$...
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Q JEE MAIN 2020
A battery of 3.0 V is connected to a resistor dissipating 0.5 W of power. If the terminal voltage of...
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Q JEE MAIN 2020
Four resistances $40 \Omega, 60 \Omega, 90 \Omega$ and $110 \Omega$ make the arms of a quadrilateral ABCD. Across AC...
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Q JEE MAIN 2020
In a meter bridge experiment S is a standard resistance. R is a resistance wire. It is found that balancing...
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Q JEE MAIN 2020
The value of current i1 flowing from A to C in the circuit diagram is
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Q JEE MAIN 2019
In the given circuit the internal resistance of the 18 V cells is negligible. If $\mathrm{R}_1=400 \Omega, \mathrm{R}_3=100 \Omega$ and...
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Q JEE MAIN 2019
In the experimental set up of metre bridge shown in the figure, the null point is obtained at a distance...
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Q JEE MAIN 2019
A moving coil galvanometer has resistance $50 \Omega$ and it indicates full deflection at 4 mA current. A voltmeter is...
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Q JEE MAIN 2019
In the circuit shown, the potential difference between A and B is:
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Q JEE MAIN 2019
A galvanometer having a resistance of $20 \Omega$ and 30 divisions on both sides has figure of merit 0.005 ampere/division....
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Q JEE MAIN 2019
Q.12 A carbon resistance has a following colour code. What is the value of the resistance?
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Q JEE MAIN 2020
Two resistors $400 \Omega$ and $800 \Omega$ are connected in series across a 6 V battery. The potential difference measured...
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Q JEE MAIN 2019
A wire of resistance R is bent to form a square ABCD as shown in the figure. The effective resistance...
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Q JEE MAIN 2020
Two steel wires having same length are suspended from a ceiling under the same load. If the ratio of their...
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Q JEE MAIN 2020
The series combination of two batteries, both of the same emf 10 V , but different internal resistance of $...
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Q JEE-MAIN 2020
Which of the following will NOT be observed when a multimeter (operating in resistance measuring mode) probes connected across a...
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Q JEE MAIN 2020
A galvanometer having a coil resistance $100 \Omega$ gives a full scale deflection when a current of 1 mA is...
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Q JEE MAIN 2019
In a conductor, if the number of conduction electrons per unit volume is $8.5 \times 10^{28} \mathrm{~m}^{-3}$ and mean free...
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Q JEE MAIN 2020
The current $I 1$ (in A) flowing through $1 \Omega$ resistor in the following circuit is :
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Q JEE MAIN 2019
The resistance of a galvanometer is 50 ohm and the maximum current which can be passed through it is 0.002...
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Q JEE MAIN 2019
A metal wire of resistance $3 \Omega$ is elongated to make a uniform wire of double its previous length. This...
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Q JEE MAIN 2021
A resistor dissipates 192 J of energy in 1 s when a current of 4A is passed through it. Now,...
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Q JEE MAIN 2021
The voltage drop across $15 \Omega$ resistance in the given figure will be $\_\_\_\_$ V.
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Q JEE MAIN 2021
A square shaped wire with resistance of each side $3 \omega$ is bent to form a complete circle. The resistance...
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Q JEE MAIN 2021
A resistor dissipates 192 J of energy in 1 s when a current of 4A is passed through it. Now,...
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Q JEE MAIN 2019
A current of 2 mA was passed through an unknown resistor which dissipated a power of 4.4 W. Dissipated power...
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Q JEE MAIN 2021
Consider a galvanometer shunted with $5 \Omega$ resistance and $2 \%$ of current passes through it. What is the resistance...
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Q JEE MAIN 2019
The actual value of resistance R, shown in the figure is 30 $\Omega$.. This is measured in an experiment as...
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Q JEE MAIN 2021
The equivalent resistance of the given circuit between the terminals A and B is :
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Q JEE MAIN 2021
The equivalent resistance of the given circuit between the terminals A and B is :
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Q JEE MAIN 2019
The Wheatstone bridge shown in Fig. here, gets balanced when the carbon resistor used as $\mathrm{R}_1$ has the colour code...
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Q JEE-MAIN 2021
The ratio of the equivalent resistance of the network (shown in figure) between the points a and b when switch...
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Q JEE-MAIN 2021
For full scale deflection of total 50 divisions, 50 mV voltage is required in galvanometer. The resistance of galvanometer if...
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Q JEE-MAIN 2021
The colour coding on a carbon resistor is shown in the given figure. The resistance value of the given resistor...
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Q JEE MAIN 2019
For the circuit shown, with $\mathrm{R} 1=1.0 \Omega, \mathrm{R} 2=2.0 \Omega$, $\mathrm{E} 1=2 \mathrm{~V}$ and $\mathrm{E} 2=\mathrm{E} 3=4 \mathrm{~V}$, the...
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Q JEE MAIN 2019
A steel wire having a radius of 2.0 mm , carrying a load of 4 kg , is hanging from...
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Q JEE MAIN 2019
A $200 \Omega$ resistor has a certain color code. If one replaces the red color by green in the code,...
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Q JEE MAIN 2021
What equal length of an iron wire and a copper-nickel alloy wire, each of 2 mm diameter connected parallel to...
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Q JEE-MAIN 2021
An electric bulb of 500 watt at 100 volt is used in a circuit having a 200 V supply. Calculate...
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Q JEE MAIN 2021
In the given figure, the emf of the cell is 2.2 V and if internal resistance is $0.6 \Omega$. Calculate...
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Q JEE MAIN 2021
For the circuit shown, the value of current at time t = 3.2 s will be _____A.
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Q JEE-MAIN 2021
If you are provided a set of resistances $2 \Omega, 4 \Omega, 6 \Omega$ and $8 \Omega$. Connect these resistances...
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Q JEE MAIN 2021
The resistance of a conductor at 15ºC is 16 $\Omega$ at 100ºC is 20$\Omega$ What will be the temperature coefficient...
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Q JEE MAIN 2021
A $16 \Omega$ wire is bend to form a square loop. A 9 V supply having internal resistance of $...
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Q JEE-MAIN 2021
Two resistors $\mathrm{R}_1=(4 \pm 0.8) \Omega$ and $\mathrm{R}_2=(4 \pm 0.4) \Omega$ are connected in parallel. The equivalent resistance of their...
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Q JEE MAIN 2021
The given potentiometer has its wire of resistance $10 \Omega$. When the sliding contact is in the middle of the...
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Q JEE-MAIN 2021
An electric bulb rated as 200 W at 100 V is used in a circuit having 200 V supply. The...
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Q JEE MAIN 2021
In the given potentiometer circuit arrangement, the balancing length AC is measured to be 250 cm . When the galvanometer...
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Q JEE-MAIN 2021
In the given figure, there is a circuit of potentiometer of length AB = 10 m. The resistance per unit...
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Q JEE MAIN 2021
In an electric circuit, a call of certain emf provides a potential difference of 1.25 V across a load resistance...
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Q JEE MAIN 2021
A steel rod with $y=2.0 \times 10^{11} \mathrm{Nm}^{-2}$ and $\alpha=10^{-5} \mathrm{C}^{-1}$ of length 4 m and area of cross-section $...
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Q JEE MAIN 2021
A Copper (Cu) rod of length 25 cm and cross-sectional area 3 mm2 is joined with a similar Aluminium (Al)...
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Q JEE MAIN 2021
A current of 5 A is passing through a non-linear magnesium wire of cross-section $0.04 \mathrm{~m}^2$ . At every point...
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Q JEE MAIN 2019
In the figure shown, what is the current (in Ampere) drawn from the battery? You are given : $$ \begin{aligned}...
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Q JEE MAIN 2021
In the given figure, a battery of emf E is connected across a conductor PQ of length ' I '...
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Q JEE MAIN 2019
In the circuit shown, a four wire potentiometer is made of a 400 cm long wire, which extends between A...
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Q JEE MAIN 2021
In the given figure switches $S_1$ and $S_2$ are in open condition. The resistance across ab when the switches $S_1$...
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Q JEE MAIN 2019
A cell of internal resistance r drives current through an external resistance R. The power delivered by the cell to...
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Q JEE MAIN 2021
The Value of current in the $6 \Omega$ resistance is :
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Q JEE MAIN 2021
Two resistors $\mathrm{R}_1=(4 \pm 0.8) \Omega$ and $\mathrm{R}_2=(4 \pm 0.4) \Omega$ are connected in parallel. The equivalent resistance of their...
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Q JEE MAIN 2022
In the given figure of meter bridge experiment, the balancing length AC corresponding to null deflection of the galvanometer is...
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Q JEE MAIN 2022
A. The drift velocity of electrons decreases with the increase in the temperature of conductor. B. The drift velocity is...
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Q JEE MAIN 2021
Two wires of same length and thickness having specific resistances $6 \Omega \mathrm{~cm}$ and $3 \Omega \mathrm{~cm}$ respectively are connected...
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Q JEE MAIN 2021
Consider a 72 cm long wire AB as shown in the figure. The galvanometer jockey is placed at P on...
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Q JEE Main 2019
Drift speed of electrons, when 1.5 A of current flows in a copper wire of cross section $5 \mathrm{~mm}_2$, is...
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Q JEE Main 2019
When the switch S, in the circuit shown, is closed, then the value of current i will be
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Q JEE-MAIN 2021
The four arms of a Wheatstone bridge have resistances as shown in the figure. A galvanometer of $15 \Omega$ resistance...
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Q JEE-MAIN 2021
Two cells of emf 2E and E with internal resistance r1 and r2 respectively are connected in series to an...
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Q JEE MAIN 2021
The energy dissipated by a resistor is 10 mJ in 1 s when an electric current of 2 mA flows...
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Q JEE Main 2019
A resistance is shown in the figure. Its value and tolerance are given respectively by
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Q JEE Main 2019
A copper wire is stretched to make it 0.5% longer. The percentage change in its electrical resistance if its volume...
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Q JEE MAIN 2021
A resistor develops 500 J of thermal energy in 20s when a current of 1.5 A is passed through it....
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Q _JEE_MAIN_2021
The equivalent resistance of series combination of two resistors is 's'. When they are connected in parallel, the equivalent resistance...
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Q JEE_MAIN_2021
A current of 10 A exists in a wire of crosssectional area of $5 \mathrm{~mm}^2$ with a drift velocity of...
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Q JEE MAIN 2021
The voltage across the $10 \Omega$ resistor in the given circuit is $x$ volt. he value of 'x' to the...
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Q JEE MAIN 2021
In the experiment of Ohm's law, a potential difference of 5.0 V is applied across the end of a conductor...
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Q JEE MAIN 2021
A current of 6 A enters one corner P of an equilateral triangle PQR having 3 wires of resistance 2Ω...
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Q JEE MAIN 2021
The resistance $R=\frac{V}{I}$, where $V=(50 \pm 2) V$ and $I=(20 \pm 0.2) A$. The percentage error in $R$ is '...
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Q JEE MAIN 2021
In the figure given, the electric current flowing through the $5 \mathrm{k} \Omega$ resistor is ' x ' mA .
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A wire of 1 W has a length of 1 m . It is stitched till its length increases by...
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Q JEE MAIN 2021
Five equal resistances are connected in a network as shown in figure. The net resistance between the points A and...
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A cell $E_1$ of emf 6 V and internal resistance $2 \Omega$ is connected with another cell E2 of emf...
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A current through a wire depends on time as $\mathrm{i}=\alpha_0 t +\beta t^2$ where $\alpha_0=20 \mathrm{~A} / \mathrm{s}$ and $...
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Q JEE MAIN 2021
In the given circuit of potentiometer, the potential difference $E$ across $A B(10 m$ length $)$ is larger than $E_1$...
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The current (i) at time $t=0$ and $t=\infty$ respectively for the given circuit is
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A cylindrical wire of radius 0.5 mm and conductivity $5 \times 10^7 \mathrm{~S} / \mathrm{m}$ is subjected to an electric...
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Q JEE MAIN 2022
A liquid of density $750 \mathrm{kgm}^{-3}$ flows smoothly through a horizontal pipe that tapers in cross-sectional area from $...
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" All resistances in figure are "1Omega" each. The value of current ' "l" ' is "(a)/(5)A". The value of...
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Q JEE-MAIN 2022
In a potentiometer arrangement, a cell of emf 1.20 V gives a balance point at 36 cm length of wire....
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Q JEE MAIN 2022
The current I flowing through the given circuit will be ________A.
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A current of 15 mA flows in the circuit as shown in figure. The value of potential difference between the...
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Q JEE MAIN 2022
An electrical bulb rated 220 V, 100 W, is connected in series with another bulb rated 220V, 60 W. If...
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Q JEE Main 2022
As shown in the figure, a potentiometer wire of resistance $20 \Omega$ and length 300 cm is connected with resistance...
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Q JEE MAIN 2022
Given below are two statements : Statement I: A uniform wire of resistance $80 \Omega$ is cut into four equal...
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A 1 m long wire is broken into two unequal parts X and Y The X part of the wire...
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A battery of 6 V is connected to the circuit as shown below. The current I drawn from the battery...
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Q JEE MAIN 2022
Eight copper wire of length l and diameter d are joined in parallel to form a single composite conductor of...
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In the given figure, the value of $V_0$ will be $\_\_\_\_$ V.
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Q JEE Main 2022
A wire of resistance R1 is drawn out so that its length is increased by twice of its original length....
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Q JEE MAIN 2022
Resistance are connected in a meter bridge circuit as shown in the figure. The balancing length $\mathrm{l}_1$ is 40cm. Now...
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Q JEE MAIN 2022
A 1 m long copper wire carries a current of 1 A . If the cross section of the wire...
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Q JEE MAIN 2022
In meter bridge experiment for measuring unknown resistance ' S ', the null point is obtained at a distance 30...
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Q JEE MAIN 2022
Two sources of equal emfs are connected in series. This combination is connected to an external resistance $R$. The internal...
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Q JEE MAIN 2022
The current I in the given circuit will be :
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Which of the following physical quantities have the same dimensions ?
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Water fall from a 40 m high dam at the rate of $9 \times 10^4 \mathrm{~kg}$ per hour. Fifty percentage...
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Q JEE MAIN 2022
In the given circuit 'a' is an arbitrary constant. The value of m for which the equivalent circuit resistance is...
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Q JEE MAIN 2022
The current density in a cylindrical wire of radius r = 4.0 mm is $1.0 \times 10^6 \mathrm{~A} / \mathrm{m}^2$....
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Q JEE MAIN 2022
Two resistors are connected in series across a battery as shown in figure. If a voltmeter of resistance $2000 \Omega$...
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Q JEE MAIN 2022
The combination of two identical cells, whether connected in series or parallel combination provides the same current through an external...
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The length of a given cylindrical wire is increased to double of its original length. The percentage increase in the...
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If n represents the actual number of deflections in a converted galvanometer of resistance G and shunt resistance S. Then...
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A potentiometer wire of length 10 m and resistance $20 \Omega$ is connected in series with a 25 V battery...
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The equivalent resistance between points A and B in the given network is :
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What will be the most suitable combination of three resistors $\mathrm{A}=2 \Omega, \mathrm{~B}=4 \Omega, \mathrm{C}=6 \Omega$ so that $\left(\frac{22}{3}\right) \Omega$...
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Two identical charged particles each having a mass 10 g and charge $2.0 \times 10^{-7} \mathrm{C}$ area placed on a...
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Q JEE MAIN 2022
Identify the pair of physical quantities that have same dimensions :
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For the network shown below, the value $V_B-V_A$ is V.
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The variation of applied potential and current flowing through a given wire is shown in figure. The length of wire...
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The current density in a cylindrical wire of radius 4 mm is 4 $\times 10^6 \mathrm{Am}^{-2}$. The current through the...
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Q JEE MAIN 2022
A cell, shunted by a 8 $\Omega$ resistance, is balanced across a potentiometer wire of length 3m. The balancing length...
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Q JEE MAIN 2022
A 220 V, 50 Hz AC source is connected to a 25 V, 5 W lamp and an additional resistance...
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Q JEE MAIN 2022
Current measured by the ammeter (A) in the reported circuit when no current flows through $10 \Omega$ resistance. will be...
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Q JEE MAIN 2022
In a potentiometer arrangement, a cell gives a balancing point at 75 cm length of wire. This cell is now...
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Q JEE MAIN 2022
A meter bridge setup is shown in the figure. It is used to determine an unknown resistance R using a...
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Q JEE MAIN 2022
The total current supplied to the circuit as shown in figure by the 5V battery is __________A
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A resistor develops 300 J of thermal energy in 15s, when a current of 2A is passed through it. If...
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Q JEE-Main_2024
In the given circuit, the current flowing through the resistance $20 \Omega$ is 0.3 A , while the ammeter reads...
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Q JEE MAIN 2022
A teacher in his physics laboratory allotted an experiment to determine the resistance (G) of a galvanometer. Students took the...
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A 72 $\Omega$ galvanometer is shunted by a resistance of 8 $\Omega$. The percentage of the total current which passes...
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An aluminium wire is stretched to make its length, 04% larger. Then percentage change in resistance is:
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A sliver wire has mass $(0.6 \pm 0.006) \mathrm{g}$, radius $(0.5 \pm 0.005)$ mm and length $(4 \pm 0.04)$ cm....
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Two identical cells each of emf 1.5 V are connected in parallel across a parallel combination of two resistors each...
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In the given circuit, the current in resistance $R_3$ is i.
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In a metre-bridge when a resistance in the left gap is 2Ω and unknown resistance in the right gap, the...
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Q JEE MAIN 2024
By what percentage will the illumination of the lamp decrease if the current drops by 20% ?
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Two resistance of $100 \Omega$ and $200 \Omega$ are connected in series with a battery of 4 V and negligible...
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The resistance per centimeter of a meter bridge wire is r , with $\mathrm{X} \Omega$ resistance in left gap. Balancing...
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When a potential difference V is applied across a wire of resistance R, it dissipates energy at a rate W....
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Three voltmeters, all having different internal resistances are joined as shown in figure. When some potential difference is applied across...
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To measure the temperature coefficient of resistivity $\alpha$ of a semiconductor, an electrical arrangement shown in the figure is prepared....
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Q JEE MAIN 2024
In an ammeter, 5 % of the main current passes through the galvanometer. If resistance of the galvanometer is G...
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Wheatstone bridge principle is used to measure the specific resistance $\left(S_1\right)$ of given wire, having length L , radius r...
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Two cells are connected between points A and B as shown. Cell 1 has emf of 12 V and internal...
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As shown in the figure, the voltmeter reads 2 V across $5 \Omega$ resistor. The resistance of the voltmeter is...
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Two cells of emf 1 V and 2 V and internal resistances $2 \Omega$ and $1 \Omega$, respectively, are connected...
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A student is provided with a variable voltage source V , a test resistor $\mathrm{R}_{\mathrm{r}}=10 \Omega$, two identical galvanometers $\mathrm{G}_1$...
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A hollow cylindrical conductor has length of 3.14 m , while its inner and outer diameters are 4 mm and...
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Figure shows a part of an electric circuit. The potentials at points a, b and c are 30 V, 12...
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A motor operating on 100 V draws a current of 1 A. If the efficiency of the motor is $...
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There are 'n' number of identical electric bulbs, each is designed to draw a power p independently from the mains...
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A rectangular parallelopiped is measured as $1 \mathrm{~cm} \times 1 \mathrm{~cm} \times 100 \mathrm{~cm}$. If its specific resistance is $...
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Q JEE MAIN 2023
The number density of free electrons in copper is nearly $8 \times 10^{28} \mathrm{~m}^{-3}$. A copper wire has its area...
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Q JEE MAIN 2023
The equivalent resistance between A and B as shown in figure is:
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If the potential difference between B and D is zero, the value of x is $\Omega$. The value of n...
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As shown in the figure, a network of resistors is connected to a battery of 24 V with an internal...
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A null point is found at 200 cm in potentiometer when cell in secondary circuit is shunted by $5 \Omega$....
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For the given circuit, in the steady state, $\left|\mathrm{V}_{\mathrm{B}}-\mathrm{V}_{\mathrm{D}}\right|=$ $\_\_\_\_$ V.
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When two resistance $\mathrm{R}_1$ and $\mathrm{R}_2$ connected in series and introduced into the left gap of a meter bridge and...
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A water heater of power 2000 W is used to heat water. The specific heat capacity of water is $...
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In the given circuit the value of $\left|\frac{I_1+I_3}{I_2}\right|$ is:
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If a copper wire is stretched to increase its length by 20°%. The percentage increase in resistance of the wire...
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With the help of potentiometer, we can determine the value of emf of a given cell. The sensitivity of the...
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The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity...
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Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R....
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A cell of emf 90 V is connected across series combination of two resistors each of $100 \Omega$ resistance. A...
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Q JEE MAIN 2023
Equivalent resistance between the adjacent corners of a regular n-sided polygon of uniform wire of resistance R would be:
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The H amount of thermal energy is developed by a resistor in 10 s when a current of 4A is...
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When a resistance of $5 \Omega$ is shunted with a moving coil galvanometer, it shows a fullscale deflection for a...
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A potential $V_0$ is applied across a uniform wire of resistance $R$. The power dissipation is $P_1$. The wire is...
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The current flowing through a conductor connected across a source is 2A and 1.2 A at 0oC and 100oC respectively....
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10 resistors each of resistance 10 can be connected in such as to get maximum and minimum equivalent resistance. The...
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In the circuit diagram shown in figure given below, the current flowing through resistance $3 \Omega$ is $\frac{x}{3} A$. is...
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A network of four resistances is connected to 9V battery, as shown in figure. The magnitude of voltage difference between...
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A current of 2 A flows through a wire of cross-sectional area $25.0 \mathrm{~mm}^2$. The number of free electrons in...
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Different combination of 3 resistors of equal resistance R are shown in the figures. The increasing order for power dissipation...
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Q JEE MAIN 2023
The equivalent resistance of the circuit shown below between points a and b is:
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A wire of resistance $160 \Omega$ is melted and drawn in wire of one-fourth of its length. The new resistance...
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The current sensitivity of moving coil galvanometer is increased by 25%. This increase is achieved only by changing in the...
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Q JEE MAIN 2023
Given below are two statements: Statement I : The equivalent resistance of resistors in a series combination is smaller than...
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Q JEE MAIN 2023
The length of a metallic wire is increased by 20% and its area of cross section is reduced by 4%....
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Q JEE MAIN 2023
For designing a voltmeter of range 50 V and an ammeter of range 10 mA using a galvanometer which has...
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Q JEE MAIN 2023
Certain galvanometers have a fixed core made of non-magnetic metallic material. The function of this metallic material is
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In a metre bridge experiment the balance point in obtained if the gaps are closed by $2 \Omega$ and $...
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Q JEE MAINS 2023
In the given circuit, the equivalent resistance between the terminal A and B is _____ .
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Resistance of a wire at $0^{\circ} \mathrm{C}, 100^{\circ} \mathrm{C}$ and $t^{\circ} \mathrm{C}$ is found to be$10 \Omega, 10.2 \Omega$ and...
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A uniform metallic wire carries a current 2 A. when 3.4 V battery is connected across it. The mass of...
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Q JEE MAIN_2023
In an experiment to find emf of a cell using potentiometer, the length of null point for a cell of...
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Q JEE MAIN 2023
Two identical cells, when connected either in parallel or in series gives same current in an external resistance $5 \Omega$....
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Q JEE MAIN_2023
The equivalent resistance between A and B of the network shown in figure:
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The drift velocity of electrons for a conductor connected in an electrical circuit is Vd . The conductor in now...
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The charge flowing in a conductor changes with time as $\mathrm{Q}(\mathrm{t})=\alpha \mathrm{t}-\beta \mathrm{t}^2+\gamma \mathrm{t}^3$. Where $\alpha, \beta$ and $\gamma$ are...
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Q JEE MAINS 2024
Equivalent resistance of the following network is Ω.
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A wire of resistance R and radius r is stretched till its radius became r/2. If new resistance of the...
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In the given circuit, the terminal potential difference of the cell is :
JEE Main Physics Medium
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The value of unknown resistance (x) for which the potential difference between B and D will be zero in the...
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In the experiment to determine the galvanometer resistance by half-deflection method, the plot of 1/θ vs the resistance (R) of...
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Twelve wires each having resistance $2 \Omega$ are joined to form a cube. A battery of 6 V emf is...
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The current in a conductor is expressed as $I=3 t^2+4 t^3$, where I is in Ampere and t is in...
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In the given figure R_1=10Ω,R_2=8Ω,R_3=4Ω and R_4=8Ω. Battery is ideal with emf 12" " V. Equivalent resistant of the circuit...
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To measure the internal resistance of a battery, potentiometer is used. For $\mathrm{R}=10 \Omega$, the balance point is observed at...
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The resistances of the platinum wire of a platinum resistance thermometer at the ice point and steam point are 8...
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A galvanometer has a resistance of 50Ω and it allows maximum current of 5mA. It can be converted into voltmeter...
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The reading in the ideal voltmeter (V) shown in the given circuit diagram is
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Two cells are connected in opposition as shown. Cell $E_1$ is of 8V emf and 2Ω internal resistance; the cell...
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An electric toaster has resistance of 60Ω at room temperature $\left(27^{\circ} \mathrm{C}\right)$. The toaster is connected to a 220 V...
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A potential divider circuit is shown in figure. The output voltage $\mathrm{V}_0$ is
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The deflection in moving coil galvanometer falls from 25 divisions to 5 division when a shunt of 24Ω is applied....
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A galvanometer having coil resistance 10Ω shows a full scale deflection for a current of 3 mA. For it to...
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The electric current through a wire varies with time as $I=I_0+\beta \mathrm{t}$. where $I_0=20 \mathrm{~A}$ and $\beta=3 \mathrm{~A} / \mathrm{s}$....
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In a moving coil galvanometer, two moving coils $M_{1}$ and $M_{2}$ have the following particulars : $...
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The charge accumulated on the capacitor connected in the following circuit is $\mu \mathrm{C} ($ Given $\mathrm{C}=150 \mu \mathrm{~F})$
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A wire of resistance R and length L is cut into 5 equal parts. If these parts are joined parallely,...
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A wire of length 10 cm and radius $\sqrt 7 \times {10^{ - 4}}\;{\rm{m}}$ connected across the right gap of...
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Current passing through a wire as function of time is given as ${\rm{I}}({\rm{t}}) = 0.02{\rm{t}} + 0.01\;{\rm{A}}$. The charge that...
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Q JEE MAIN 2025
The value of current $I$ in the electrical circuit as given below, when potential at $A$ is equal to the...
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In the figure shown below, a resistance of $150.4\Omega $ is connected in series to an ammeter A of resistance...
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A wire of length 25 m and cross-sectional area $5\;{\rm{m}}{{\rm{m}}^2}$ having resistivity of $2 \times {10^{ - 6}}\Omega \;{\rm{m}}$ is...
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A wire of resistance R is bent into a triangular pyramid as shown in figure with each segment having same...
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The battery of a mobile phone is rated as 4.2 V, 5800 mAh. How much energy is stored in it...
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A wire of resistance R is bent into an equilateral triangle and an identical wire is bent into a square....
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Q JEE MAIN 2025
Find the equivalent resistance between two ends of the following circuit
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A wire of resistance $9\Omega$ is bent to form an equilateral triangle. Then the equivalent resistance across any two vertices...
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Consider a moving coil galvanometer (MCG): A. The torsional constant in moving coil galvanometer has dimentions $\left[ {\text{M}{{\text{L}}^{2}}~{{\text{T}}^{{-2}}}} \right]$ B....
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Q JEE MAIN 2025
A galvanometer having a coil of resistance $30 \Omega$ need 20 mA of current for full-scale deflection. If a maximum...
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Sliding contact of a potentiometer is in the middle of the potentiometer wire having resistance $R_p=1 \Omega$ as shown in...
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Q JEE MAIN 2025
Given below are two statements : Statement-I : The equivalent emf of two nonideal batteries connected in parallel is smaller...
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An amount of ice of mass $10^{-3} \mathrm{~kg}$ and temperature $-10^{\circ} \mathrm{C}$ is transformed to vapour of temperature $110^{\circ} \mathrm{C}$...
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Which of the following resistivity $(\rho )$ v/s temperature (T) curves is most suitable to be used in wire bound...
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