Q JEE MAIN 2026

A circular coil of radius 2 cm and 125 turns carries a current of 1 A . The coil is...

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Two identical small bar magnets each of dipole moment $3 \sqrt{5} \mathrm{~J} / \mathrm{T}$ are placed at a center to...

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A solenoid has a core made of material with relative permeability 400 . The magnetic field produced in the interior...

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A 5 mg particle carrying a charge of $5 \pi \times 10^{-6} \mathrm{C}$ is moving with velocity of $...

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A current carrying circular loop of radius 2 cm with unit normal $\hat{n}=\frac{\hat{k}+\hat{i}}{\sqrt{2}}$ is placed in a magnetic field, $...

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A current of 30 A each flows in opposite directions in two conducting wires, placed parallel to each other at...

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A small cube of side 1 mm is placed at the centre of a circular loop of radius 10 cm...

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A particle of charge q and mass m is projected from origin with an initial velocity $\vec{v}=\left(\frac{v_0}{\sqrt{2}} \hat{x}+\frac{v_0}{\sqrt{2}} \hat{y}\right)$. There...

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In the given circuit below inductance values of $L_1, L_2$ and $L_3$ are same. The magnetic energy stored in the...

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Q JEE MAIN_2026

The charged particle moving in a uniform magnetic field of $(3 \hat{i}+2 \hat{j}) \mathrm{T}$ has an acceleration $...

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Q JEE MAIN_2026

An insulated wire is wound so that it forms a flat coil with $\mathrm{N}=200$ turns. The radius of the innermost...

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A particle having charge $10^{-9} \mathrm{C}$ moving in $x-y$ plane in fields of $0.4 \hat{j} \mathrm{~N} / \mathrm{C}$ and $...

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Q JEE MAIN_2026

$1 \mu \mathrm{C}$ charge moving with velocity $\vec{v}=(\hat{i}-2 \hat{j}+3 \hat{k}) \mathrm{m} / \mathrm{s}$ in the region of magnetic field $...

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Q JEE MAIN 2026

Two identical long current carrying wires are bent into the shapes shown in the following figures. If the magnitude of...

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Q JEE Main 2024

A square loop of edge length 2 m carrying current of 2 A is placed with its edges parallel to...

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Given below are two statements: Statement (I): When currents vary with time, Newton's third law is valid only if momentum...

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Q JEE MAIN 2026

The magnetic field at the centre of a current carrying circular loop of radius $R$ is $16 \mu \mathrm{~T}$. The...

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Three long straight wires carrying current are arranged mutually parallel as shown in the figure. The force experienced by 15...

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Two identical circular loops P and Q each of radius r are lying in parallel planes such that they have...

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Q JEE MAIN 2026

A short bar magnet placed with its axis at $30^{\circ}$ with an external field of 800 Gauss, experiences a torque...

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Q JEE MAIN 2026

The current passing through a conducting loop in the form of equilateral triangle of side $4 \sqrt{3} \mathrm{~cm}$ is 2...

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Q JEE MAIN 2026

An infinitely long straight wire carrying current $I$ is bent in a planer shape as shown in the diagram. The...

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Q JEE MAIN 2020

A beam of protons with speed $4 \times 10^5 \mathrm{~ms}^{-1}$ enters a uniform magnetic field of 0.3 T at an...

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Q JEE MAIN 2020

Magnetic materials used for making permanent magnets (P) and magnets in a transformer (T) have different properties of the following,...

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Q JEE MAIN 2020

The figure shows a region of length ' l ' with a uniform magnetic field of 0.3 T in it...

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Q JEE MAIN 2019

A magnetic compass needle oscillates 30 times per minute at a place where the dip is $45^{\circ}$, and 40 times...

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Q JEE MAIN 2019

A particle having the same charge as of electron moves in a circular path of radius 0.5 cm under the...

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Q JEE-MAIN 2019

A proton and an $\alpha$-particle (with their masses in the ratio of $1: 4$ and charges in the ratio of...

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Q JEE MAIN_2019_

A proton, an electron, and a Helium nucleus, have the same energy. They are in circular orbits in a plane...

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Q JEE MAIN 2019

A paramagnetic material has 1028 atoms $/ \mathrm{m}^3$. Its magnetic susceptibility at temperature 350 K is $2.8 \times 10^{-4}$. Its...

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Q JEE MAIN 2019

A rigid square loop of side ‘a’ and carrying current $\mathrm{l}_2$ is lying on a horizontal surface near a long...

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Q JEE MAIN 2019

Find the magnetic field at point P due to a straight line segment AB of length 6 cm carrying a...

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Q JEE MAIN 2019

An electron, moving along the x-axis with an initial energy of 100 eV , enters a region of magnetic field...

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Two wires A and B are carrying currents $\mathrm{I}_1$ and $\mathrm{I}_2$ as shown in the figure. The separation between them...

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Q JEE MAIN 2020

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An electron is moving along $+x$ direction with a velocity of $6 \times 10^6 \mathrm{~ms}^{-1}$. It enters a region of...

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Q JEE MAIN 2020

A particle of charge $q$ and mass $m$ is moving with a velocity $-v \hat{i}(v \neq 0)$ towards a large...

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A square loop of side 2a and carrying current I is kept in xz plane with its centre at origin....

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Q JEE MAIN 2020

A charged particle of mass ' $m$ ' and charge ' $q$ ' moving under the influence of uniform electric...

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An infinitely long, straight wire carrying current I, one side opened rectangular loop and a conductor C with a sliding...

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Q JEE MAIN 2020

Proton with kinetic energy of 1 MeV moves from south to north. It gets an acceleration of $...

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Q JEE MAIN 2020

The electric fields of two plane electromagnetic plane waves in vacuum are given by $...

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A magnet of total magnetic moment $10^{-2} \hat{i} \mathrm{~A}-\mathrm{m} 2$ is placed in a time varying magnetic field, $...

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Q JEE MAIN 2020

A small bar magnet placed with its axis at 30° with an external field of 0.06 T experiences a torque...

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Q JEE MAIN 2019

A particle having the same charge as of electron moves in a circular path of radius 0.5 cm under the...

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Q JEE MAIN 2020

A wire A, bent in the shape of an arc of a circle, carrying a current of 2 A and...

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Q JEE MAIN 2019

A particle of mass $m$ and charge $q$ is in an electric and magnetic field given by $$ \vec{E}=2 \hat{j}+3...

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Q JEE-MAIN 2020

A galvanometer coil has 500 turns and each turn has an average area of $3 \times 10^{-4} \mathrm{~m}^2$. If a...

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Q JEE MAIN 2020

A paramagnetic sample shows a net magnetisation of $6 \mathrm{~A} / \mathrm{m}$ when it is placed in an external magnetic...

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Q JEE MAIN 2019

A paramagnetic substance in the form of a cube with sides 1 cm has a magnetic dipole moment of $...

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Q JEE MAIN 2020

An electron gun is placed inside a long solenoid of radius R on its axis. The solenoid has n turns/length...

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Q JEE-MAIN 2020

A perfectly diamagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagnetic substance. The...

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Q JEE MAIN 2020

A very long wire ABDMNDC is shown in figure carrying current I. AB and BC parts are straight, long and...

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Q JEE MAIN 2020

A small circular loop of conducting wire has radius a and carries current I. It is placed in a uniform...

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Q JEE MAIN 2019

A moving coil galvanometer has a coil with 175 turns and area 1 cm 2 . It uses a torsion...

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Q JEE MAIN 2020

A loop ABCDEFA of straight edges has six corner points $A(0,0,0), B(5,0,0), C(5,5,0), D(0,5,0)$, $E(0,5,5)$ and $F(0,0,5)$. The magnetic field...

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Q JEE MAIN 2020

Two infinite planes each with uniform surface charge density $+\sigma$ are kept in such a way that the angle between...

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Q JEE MAIN 2020

Consider a circular coil of wire carrying constant current I, forming a magnetic dipole. The magnetic flux through an infinite...

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Q JEE MAIN 2020

If the magnetic field in a plane electromagnetic wave is given by $...

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Q JEE MAIN 2021

A long solenoid with $1000 \mathrm{turns} / \mathrm{m}$ has a core material with relative permeability 500 and volume $10^3 \mathrm{~cm}^3$....

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Q JEE MAIN 2021

A long solenoid with 1000 turns $/ \mathrm{m}$ has a core material with relative permeability 500 and volume $10^3 \mathrm{~cm}^3$....

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Q JEE MAIN 2019

At some location on earth the horizontal component of earth’s magnetic field is 18 × 10–6 T. At this location,...

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Q JEE MAIN 2021

A small square loop of side ' $a$ ' and one turn is placed inside a larger square loop of...

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Q JEE MAIN 2021

A current of 1.5 A is flowing through a triangle, of side 9 cm each. The magnetic field at the...

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A current of 1.5 A is flowing through a triangle, of side 9 cm each. The magnetic field at the...

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Q JEE-MAIN 2021

A coaxial cable consists of an inner wire of radius ‘a’ surrounded by an outer shell of inner and outer...

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A coil having N turns is wound tightly in the form of a spiral with inner and outer radii 'a'...

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Q JEE-MAIN 2021

Match List-I with List-II

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Q JEE MAIN 2019

A circular coil having $N$ turns and radius $r$ carries a current I. It is held in the XZ plane...

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Q JEE MAIN 2021

Two short magnetic dipoles $m_1$ and $m_2$ each having magnetic moment of $1 \mathrm{Am}^2$ are placed at point $O$ and...

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Q JEE-MAIN 2021

A coil in the shape of an equilateral triangle of side 10 cm lies in a vertical plane between the...

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Q JEE-MAIN 2021

If the maximum value of accelerating potential provided by a ratio frequency oscillator is 12 kV. The number of revolution...

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Q JEE-MAIN 2021

Match List-I with List-II

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Q JEE MAIN 2021

The fractional change in the magnetic field intensity at a distance ' $r$ ' from centre on the axis of...

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Q JEE MAIN 2021

Figure A and B shown two long straight wires of circular cross-section (a and b with a < b), carrying...

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Q JEE-MAIN 2021

Following plots show Magnetization (M) vs Magnetising field (H) and Magnetic susceptibility (χ) vs temperature (T) graph :

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Q JEE MAIN 2021

Two ions having same mass have charges in the ratio 1 : 2. They are projected normally in a uniform...

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Q JEE MAIN 2021

Figure A and B shown two long straight wires of circular cross-section (a and b with a < b), carrying...

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Q JEE MAIN 2021

In a uniform magnetic field, the magnetic needle has a magnetic moment $9.85 \times 10^{-2} \mathrm{~A} / \mathrm{m}^2$ and moment...

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Q JEE MAIN 2021

Statement I : The ferromagnetic property depends on temperature. At high temperature, ferromagnet becomes paramagnet. Statement II : At high...

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Q JEE MAIN 2021

A deuteron and an alpha particle having equal kinetic energy enter perpendicular into a magnetic field. Let rd and $\mathbf{r}_\alpha$...

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Q JEE MAIN 2019

In a simple pendulum experiment for determination of acceleration due to gravity (g), time taken for 20 oscillations is measured...

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Q JEE MAIN 2021

There are two infinitely long straight current carrying conductors and they are held at right angles to each other so...

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Q JEE MAIN 2019

Two magnetic dipoles $X$ and $Y$ are placed at a separation $d$, with their axes perpendicular to each other. The...

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Q JEE MAIN 2021

The magnetic susceptibility of a material of a rod is 499 . Permeability in vacuum is $...

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Q JEE MAIN 2021

At an angle of 30° to the magnetic meridian, the apparent dip is 45°. Find the true dip :

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Q JEE MAIN 2021

Following plots show Magnetization (M) vs Magnetising field (H) and Magnetic susceptibility ( $\alpha$ ) vs temperature (T) graph :...

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Q JEE MAIN 2022

A cyclotron in used to accelerate protons. If the operating magnetic field is 1.0 T and the radius of the...

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Q JEE MAIN 2022

A compass needle of oscillation magnetometer oscillates 20 times per minute at a place P of dip $30^{\circ}$ The number...

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Q JEE MAIN 2021

If the angular velocity of earth's spin is increased such that the bodies at the equator start floating, the duration...

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Q JEE MAIN 2021

A plane electromagnetic wave propagating along y-direction can have the following pair of electric field $(\vec{E})$ and magnetic field $(\vec{B})$...

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Q JEE MAIN 2021

A proton and an a-particle, having kinetic energies $\mathrm{K}_{\mathrm{a}}$ and $\mathrm{K}_{\mathrm{a}}$, respectively, enter into a magnetic field at right angles....

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Q JEE MAIN 2021

Which of the following statements are correct? (A) Electric monopoles do not exist whereas magnetic monopoles exist. (B) Magnetic field...

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Q JEE-MAIN 2021

A hairpin like shape as shown in figure is made by bending a long current carrying wire. What is the...

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An infinitely long current carrying wire and a small current carrying loop are in the plane of the paper as...

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The magnetic field in a region is given by $\overrightarrow{\mathrm{B}}-=\mathrm{B}_0\left(\frac{\mathrm{x}}{\mathrm{a}}\right) \hat{\mathrm{k}}$. A square loop of side d is placed with...

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Q JEE MAIN 2021

A charge $Q$ is moving $\overline{\operatorname{dI}}$ distance in the magnetic field $\vec{B}$ - Find the value of work done by...

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Q JEE MAIN 2021

A loop of flexible wire of irregular shape carrying current is placed in an external magnetic field. Identify the effect...

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Four identical long solenoids A, B, C and D are connected to each other as shown in the figure. If...

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Q JEE MAIN 2021

Match List – I with List-II List- I (a) 10 km height over earth's surface (b) 70 km height over...

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Q JEE MAIN 2021

A conducting bar of length L is free to slide on two parallel conducting rails as shown in the figure

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A bar magnet of length 14 cm is placed in the magnetic meridian with its north pole pointing towards the...

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Q JEE MAIN 2021

Magnetic fields at two points on the axis of a circular coil at a distance of 0.05m and 0.2 m...

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Q JEE MAIN 2021

In a ferromagnetic material, below the curie temperature, a domain is defined as :

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A proton, a deuteron and an  particle are moving with same momentum in a uniform magnetic field. The ratio...

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A soft ferromagnetic material is placed in an external magnetic field. The magnetic domains :

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Q JEE MAIN 2022

The vertical component of the earth’s magnetic field is$6 \times 10^{-5} T$ at any place where the angle of dip...

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A wire of length 314 cm carrying current of 14 A is bent to form a circle. The magnetic moment...

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A closely wounded circular coil of radius 5 cm produces a magnetic field of $37.68 \times 10^{-4} \mathrm{~T}$ at its...

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An electron with energy 0.1 keV moves at right angle to the earth's magnetic field of $1 \times 10^{-4} \mathrm{Wbm}^{-2}$....

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Q JEE MAIN 2022

The magnetic field at the center of current carrying circular loop is $\mathrm{B}_1$. The magnetic field at a distance of...

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A triangular shaped wire carrying 10A current is placed in a uniform magnetic field of 0.5T, as shown in figure....

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A wire X of length 50 cm carrying a current of 2 A is placed parallel to a long wire...

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A velocity selector consists of electric field $\vec{E}=E \hat{k}$ and magnetic field $\vec{B}=B \hat{j}$ with $B=12 m T$. The value...

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Q JEE MAIN 2022

Two concentric circular loops of radii $r_1=30 \mathrm{~cm}$ and $r_2=50 \mathrm{~cm}$ are placed in $X-Y$ plane as shown in the...

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As shown in the figure, a metallic rod of linear density $0.45 \mathrm{~kg} \mathrm{~m}^{-1}$ is lying horizontally on a smooth...

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The current sensitivity of a galvanometer can be increased by : (A) decreasing the number of turns (B) increasing the...

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Q JEE MAIN 2022

A magnet hung at $45^{\circ}$ with magnetic meridian makes an angle of $60^{\circ}$ with the horizontal. The actual value of...

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Q JEE MAIN 2022

Two charged particles, having same kinetic energy, are allowed to pass through a uniform magnetic field perpendicular to the direction...

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Two bar magnets oscillate in a horizontal plane in earth’s magnetic field with time periods of 3 s and 4...

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Q JEE MAIN 2022

The electric current in a circular coil of 2 turns produces a magnetic induction $B_1$ at its centre. The coil...

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Q JEE MAIN 2022

$B_X$ and $B_Y$ are the magnetic field at the centre of two coils of two coils X and Y respectively,...

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A charge particle is moving in a uniform magnetic field $(2 \hat{i}+3 \hat{j}) T$ . If it has an acceleration...

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A metallic rod of length 20 cm is palced in North- South direction and is moved at a constant speed...

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A deuteron and a proton moving with equal kinetic energy enter into to a uniform magnetic field at right angle...

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Given below are two statements : Statement I: The electric force changes the speed of the charged particle and hence...

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Two long parallel conductors $\mathrm{S}_1$ and $\mathrm{S}_2$ are separated by a distance 10 cm and carrying currents of 4A and...

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Two long current carrying conductors are placed parallel to each other at a distance of 8 cm between them. The...

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Two 10 cm long, straight wires, each carrying a current of 5 A are kept parallel to each other. If...

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Given below are two statements : One is labeled as Assertion A and the other is labelled as Reason R....

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A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and...

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Given below are two statements: Statement – I : Susceptibilities of paramagnetic and ferromagnetic substances increase with decrease in temperature....

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An electric bulb is rated as 200 W. What will be the peak magnetic field at 4 m distance produced...

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A long cylindrical volume contains a uniformly distributed charge of density $\rho$. The radius of cylindrical volume is R. A...

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A proton, a deuteron and an $\alpha-$particle with same kinetic energy enter into a uniform magnetic field at right angle...

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The soft-iron is a suitable material for making an electromagnet. This is because soft-iron has :

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At a certain place the angle of dip is $30^{\circ}$ and the horizontal component of earth's magnetic field is 0.5...

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A singly ionized magnesium atom (A24) ion is accelerated to kinetic energy 5 keV and is projected perpendicularly into a...

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The elastic behaviour of material for linear streass and linear strain, is shown in the figure. The energy density for...

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The susceptibility of a paramagnetic material is 99. The permeability of the material in Wb/A-m is : [Permeability of free...

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The magnetic field at the centre of a circular coil of radius r, due to current I flowing through it,...

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A long straight wire with a circular crosssection having radius R , is carrying a steady current I . The...

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In the figure, a very large plane sheet of positive charge is shown. $P_1$ and $P_2$ are two points at...

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Motion of a particle in x-y plane is described by a set of following equations $...

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A charge of $4.0 \mu \mathrm{C}$ is moving with a velocity of $4.0 \times 10^6 \mathrm{~ms}^{-1}$ along the positive y...

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A horizontal straight wire 5 m long extending from east to west falling freely at right angle to horizontal component...

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Given below are two statements : One is labeled as Assertion (A) and the other is labelled as Reason (R)....

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Q JEE MAIN 2024

Two circular coils P and Q of 100 turns each have same radius of $\pi \mathrm{cm}$. The currents in P...

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Q JEE MAIN 2024

A moving coil galvanometer has 100 turns and each turn has an area of $2.0 \mathrm{~cm}^2$. The magnetic field produced...

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Q JEE MAIN 2024

The current of 5 A flows in a square loop of sides 1 m is placed in air. The magnetic...

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Q JEE MAIN 2024

The magnetic field at the centre of a wire loop formed by two semicircular wires of radii $\mathrm{R}_1=2 \pi \mathrm{~m}$...

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Q JEE MAIN 2024

A uniform magnetic field of $2 \times 10^{-3} \mathrm{~T}$ acts along positive Y -direction. A rectangular loop of sides 20...

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Q JEE MAIN 2024

An electron revolving in $\mathrm{n}^{\text {th }}$ Bohr orbit has magnetic moment $\mu_n$. If $\mu_n \alpha n^x$, the value of...

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Q JEE MAIN 2024

A current of $200 \mu \mathrm{~A}$ deflects the coil of a moving coil galvanometer through $60^{\circ}$. The current to cause...

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Q JEE MAIN 2023

A proton with a kinetic energy of 2.0 eV moves into a region of uniform magnetic field of magnitude $...

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Q JEE MAIN 2025

A particle of charge $1.6 \mu \mathrm{C}$ and mass $16 \mu \mathrm{~g}$ is present in a strong magnetic field of...

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Figure shows a current carrying square loop $A B C D$ of edge length is ' a ' lying in...

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Q JEE MAIN 2023

A conducting loop of radius $\frac{10}{\sqrt{\pi}}$ is placed perpendicular to a uniform magnetic field of 0.5T. The magnetic field is...

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Q JEE MAIN_2025

A magnetic dipole experiences a torque of $80 \sqrt{3} \mathrm{Nm}$ when placed in uniform magnetic field in such a way...

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Q JEE MAIN 2025

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Q JEE MAIN 2023

A straight wire AB of mass 40 g and length 50 cm is suspended by a pair of flexible leads...

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Q JEE MAIN 2023

A straight wire carrying a current of 14 A is bent into a semicircular are of radius 2.2 cm as...

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Q JEE MAIN 2023

A square loop of side 2.0 cm is placed inside a long solenoid that has 50 turns per centimetre and...

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A bar magnet is released from rest along the axis of a very long vertical copper tube. After some time...

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An electron is moving along the positive x-axis. If the uniform magnetic field is applied parallel to the negative z-axis....

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An electron is allowed to move with constant velocity along the axis of current carrying straight solenoid. A. The electron...

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Given below are two statements; one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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A current carrying rectangular loop PQRS is made of uniform wire. The length PR = QS = 5 cm and...

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A single turn current loop in the shape of a right angle triangle with sides 5 cm, 12 cm, 13...

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Match List I with List II : Choose the correct answer from the options given below :

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The electric current in a circular coil of four turns produces a magnetic induction 32 T at its centre. The...

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A long conducting wire having a current I flowing through it, is bent into a circular coil of N turns....

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For a moving coil galvanometer, the deflection in the coil is 0.05 rad when a current of 10 mA is...

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A metallic rod of length 'L' is rotated with an angular speed of ‘’ normal to a uniform magnetic field...

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As shown in the figure, a long straight conductor with semicircular arc of radius $\frac{\pi}{10} \mathrm{~m}$ is carrying current $...

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An electron in a hydrogen atom revolves around its nucleus with a speed of $6.76 \times 10^6 \mathrm{~ms}^{-1}$ in an...

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A 1m long metal rod XY completes the circuit as shown in figure. The plane of the circuit is perpendicular...

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A compass needle oscillates 20 times per minute at a place where the dip is $30^{\circ}$ and 30 times per...

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The magnetic intensity at the centre of a long current carrying solenoid is found to be $1.6 \times 10^3 \mathrm{Am}^{-1}$....

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The source of time varying magnetic field may be (A) a permanent magnet (B) an electric field changing linearly with...

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Given below are two statements: Statement-I : The diamagnetic property depends on temperature. Statement-II : The included magnetic dipole moment...

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The free space inside a current carrying toroid is filled with a material of susceptibility $2 \times 10^{-2}$. The percentage...

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Two identical circular wires of radius 20 cm and carrying current $\sqrt{2} \mathrm{~A}$ are placed in perpendicular planes as shown...

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A long straight wire of circular cross-section (radius a) is carrying steady current I. The current I is uniformly distributed...

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A charge particle moving in magnetic field B, has the components of velocity along B as well as perpendicular to...

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A charge particle of 2 $\mu \mathrm{C}$ accelerated by a potential difference of 100V enters a region of uniform magnetic...

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An electron with kinetic energy 5eV enters a region of uniform magnetic field of 3μT perpendicular to its direction. An...

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Find the magnetic field at the point P in figure. The curved portion is a semicircle connected to two long...

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A rod with circular cross-section area $2 \mathrm{~cm}^2$ and length 40 cm is wound uniformly with 400 turns of an...

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A massless square loop, of wire of resistance 10 D . supporting a mass of I g . hangs vertically...

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The magnitude of magnetic induction at mid-point O due to current arrangement as shown in Fig will be :

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A single current carrying loop of wire carrying current I flowing in anticlockwise direction seen from +ve z direction and...

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A bar magnet with a magnetic moment $5.0 \mathrm{Am}^2$ is placed in parallel position relative to a magnetic field of...

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Two long straight wires P and Q carrying equal current 10A each were kept parallel to each other at 5...

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An electron moves through a uniform magnetic field B ⃗=B_0 i ˆ+2B_0 j ˆT. At a particular instant of time,...

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A circular coil having 200 turns, $2.5 \times 10^{-4} \mathrm{~m}^2$ area and carrying 100$\mu \mathrm{A}$ current is placed in a...

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A rigid wire consists of a semicircular portion of radius R and two straight sections. The wire is partially immerged...

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An element $\Delta l=\Delta x \hat{i}$ is placed at the origin and carries a large current I=10 A. The magnetic...

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Paramagnetic substances: A. align themselves along the directions of external magnetic field. B. attract strongly towards external magnetic field. C....

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Match List I with List II Choose the correct answer from the options given below :

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The magnetic field existing in a region is given by $\vec{B}=0.2(1+2 x) \hat{k} T$. A square loop of edge 50...

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A 2 A current carrying straight metal wire of resistance 1Ω, resistivity 2×〖10〗^(-6) Ωm, area of cross-section 10〖" " mm〗^2...

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A regular polygon of 6 sides is formed by bending a wire of length 4π meter. If an electric current...

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In a co-axial straight cable, the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic...

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An electron is projected with uniform velocity along the axis inside a current carrying long solenoid. Then :

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The horizontal component of earth's magnetic field at a place is $3.5 \times 10^{-5} T$. A very long straight conductor...

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Two insulated circular loop A and B radius ' a ' carrying a current of 'I' in the anti clockwise...

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A rigid wire consists of a semicircular portion of radius R and two straight sections. The wire is partially immerged...

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The magnetic potential due to a magnetic dipole at a point on its axis situated at a distance of 20...

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A solenoid having area $A$ and length ' $l$ ' is filled with a material having relative permeability 2 ....

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Two long, straight wires carry equal currents in opposite directions as shown in figure. The separation between the wires is...

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A proton moving with a constant velocity passes through a region of space without any change in its velocity. If...

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The magnetic field inside a 200 turns solenoid of radius 10 cm is $2.9 \times 10^{-4} \mathrm{Tesla}$. If the solenoid...

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A bar magnet has total length $2 l=20$ units and the field point $P$ is at a distance $d=10$ units...

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A 4.0 cm long straight wire carrying a current of 8 A is placed perpendicular to a uniform magnetic field...

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A loop ABCDA, carrying current I = 12 A, is placed in a plane, consists of two semi-circular segments of...

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An infinite wire has a circular bend of radius a , and carrying a current I as shown in figure....

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A tightly wound long solenoid carries a current of 15 A . An electron is executing uniform circular motion inside...

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A long straight wire of a circular cross-section with radius 'a' carries a steady current I. The current I is...

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Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion...

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$N$ equally spaced charges each of value $q$, are placed on a circle of radius $R$. The circle rotates about...

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Uniform magnetic fields of different strengths $\left( {{B_1}} \right.$ and $\left. {{B_2}} \right)$, both normal to the plane of the...

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A particle of charge q, mass m and kinetic energy E enters in magnetic field perpendicular to its velocity and...

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The percentage increase in magnetic field (B) when space within a current carrying solenoid is filled with magnesium (magnetic susceptibility...

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The relationship between the magnetic susceptibility $(\chi )$ and the magnetic permeability $(\mu )$ is given by : (${\mu _0}$...

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Let ${B_1}$ be the magnitude of magnetic field at center of a circular coil of radius R carrying current I....

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Consider a long thin conducting wire carrying a uniform current I. A particle having mass "M" and charge "q" is...

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A current of 5A exists in a square loop of side $\frac{1}{{\sqrt 2 }}\;{\rm{m}}$ . Then the magnitude of the...

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A proton is moving undeflected in a region of crossed electric and magnetic fields at a constant speed of $...

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Two long parallel wires $X$ and $Y$, separated by a distance of 6 cm , carry currents of 5 A...

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