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Semiconductor Electronics

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2026
The following diagram shows a Zener diode as a voltage regulator. The Zener diode is rated at $V_{\mathrm{z}}=5 \mathrm{~V}$ and...
JEE Main Physics Hard
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Q JEE MAIN 2026
Assuming in forward bias condition there is a voltage drop of 0.7 V across a silicon diode, the current through...
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Q JEE MAIN 2026
For the given logic gate circuit, which of the following is the correct truth table?
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Q JEE MAIN 2026
The correct truth table for the given input data of the following logic gate is : Inputs
JEE Main Physics Hard
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Q JEE MAIN 2026
Find the correct combination of and D inputs which can cause the LED to glow.
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Q JEE MAIN 2026
The given circuit works as :
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Q JEE MAIN 2026
The charge stored by the capacitor C in the given circuit in the steady state is ….$\mu \mathrm{C}$.
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Q JEE MAIN 2019
The transfer characteristic curve of a transistor, having input and output resistance $100 \Omega$ and $100 \mathrm{k} \Omega$ respectively, is...
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Q JEE MAIN 2020
In the following digital circuit, what will be the output at ‘Z’, when the input (A, B) are (1, 0),...
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Q JEE-MAIN 2019
The output of the given logic circuit is
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Q JEE MAIN 2019
Ge and Si diodes start conducting at 0.3 V and 0.7 V respectively. In the following figure if Ge diode...
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Q JEE MAIN 2019
An NPN transistor is used in common emitter configuration as an amplifier with $1 \mathrm{k} \Omega$ load resistance. Signal voltage...
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Q JEE MAIN_2019_
A transformer consisting of 300 turns in the primary and 150 turns in the secondary gives output power of 2.2...
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Q JEE MAIN 2020
With increasing biasing voltage of a photodiode, the photocurrent magnitude
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Q JEE MAIN 2019
Figure shows a DC voltage regulator circuit, with a Zener diode of breakdown voltage = 6 V. If the unregulated...
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Q JEE MAIN 2019
In the figure, given that $\mathrm{V}_{\mathrm{BB}}$ supply can vary from 0 to $...
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Q JEE MAIN 2020
Kraft temperature is the temperature
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Q JEE MAIN_2019_
A npn transistor operates as a common emitter amplifier, with a power gain of 60 dB. The input circuit resistance...
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Q JEE MAIN 2020
The output characteristics of a transistor is shown in the figure. When $\mathrm{V}_{\mathrm{CE}}$ is 10 V and $\mathrm{I}_{\mathrm{C}}=4.0 \mathrm{~mA}$, then...
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Q JEE MAIN 2020
Both the diodes used in the circuit shown are assumed to be ideal and have negligible resistance when these are...
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Q JEE MAIN 2019
In the given circuit the current through Zener Diode is close to
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Q JEE-MAIN 2020
Two Zener diodes (A and B) having breakdown voltages of 6 V and 4 V respectively, are connected as shown...
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Q JEE MAIN 2020
Boolean relation at the output stage-Y for the following circuit is :
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Q JEE MAIN 2019
The figure represents a voltage regulator circuit using a Zener diode. The breakdown voltage of the Zener diode is 6...
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Q JEE MAIN 2020
Take the breakdown voltage of the zener diode used in the given circuit as 6 V. For the input voltage...
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Q JEE MAIN 2019
The circuit shown below contains two ideal diodes, each with a forward resistance of $50 \Omega$. If the battery voltag...
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Q JEE MAIN 2020
The circuit shown below is working as a 8 V dc regulated voltage source. When 12 V is used as...
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Q JEE MAIN 2020
Identify the operation performed by the circuit given below
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Q JEE MAIN 2020
Two identical capacitors A and B , charged to the same potential 5 V are connected in two different circuits...
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Q JEE MAIN 2020
The current i in the network is
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Q JEE MAIN 2019
The logic gate equivalent to the given logic circuit is
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Q JEE MAIN 2021
In the given circuit, value of Y is (MFST-6)
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Q JEE MAIN 2019
Ge and Si diodes start conducting at 0.3 V and 0.7 V respectively. In the following figure if Ge diode...
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Q JEE MAIN 2019
The physical sizes of the transmitter and receiver antenna in a communication system are:
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Q JEE MAIN 2020
Which of the following gives a reversible operation?
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Q JEE MAIN 2021
Statement-I: To get a steady dc output from the pulsating voltage received from a full wave rectifier we can connect...
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Q JEE MAIN 221
Statement–I : To get a steady dc output from the pulsating voltage received from a full wave rectifier we can...
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Q JEE MAIN 2019
For the circuit shown below, the current through the Zener diode is:
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Q JEE MAIN 2021
If $\mathrm{V}_{\mathrm{A}}$ and $\mathrm{V}_{\mathrm{B}}$ are the input voltages (either 5 V or 0 V ) and $\mathrm{V}_0$ is the output...
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Q JEE MAIN 2021
If $V_A$ and $V_B$ are the input voltages (either 5 V or 0 V ) and $V_0$ is the output...
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Q JEE MAIN 2021
Choose the correct waveform that can represent the voltage across R of the following circuit, assuming the diode is ideal...
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Q JEE-MAIN 2021
A zener diode of power rating 2W is to be used as a voltage regulator. If the zener diode has...
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Q JEE-MAIN 2021
For a transistor $\alpha$ and $\beta$ are given as $\alpha=\frac{I_c}{I_E}$ and $\beta=\frac{I_c}{I_B}$. Then the correct relation between $\alpha$ and $\beta$...
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Q JEE MAIN 2021
In the following logic circuit the sequence of the inputs A, B are (0, 0), (0, 1), (1, 0) and...
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Q JEE MAIN 2019
The reverse breakdown voltage of a Zener diode is 5.6 V in the given circuit
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Q JEE-MAIN 2021
For the given circuit, the power across zener diode is ............ mW.
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Q JEE MAIN 2021
Statement-I : By doping silicon semiconductor with pentavalent material, the electrons density increases. Statement-II : The n-type semiconductor has net...
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Q JEE-MAIN 2021
Four NOR gates are connected as shown in figure. The truth table for the given figure is :
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Q JEE MAIN 2021
Identify the logic operation carried out by the given circuit
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Q JEE MAIN 2021
In a semiconductor, the number density of intrinsic charge carriers at $27^{\circ} \mathrm{C}$ is $1.5 \times 10^{16} / \mathrm{m}^3$. If...
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Q JEE MAIN 2021
Find the truth table for the function Y of A and B represented in the following figure.
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Q JEE-MAIN 2021
In the given figure, each diode has a forward bias resistance of 30 Ω and infinite resistance in reverse bias....
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Q JEE MAIN 2021
In a given circuit diagram, a 5 V zener diode along with a series resistance is connected across a 50...
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Q JEE MAIN 2021
Find the truth table for the function Y of A and B represented in the following figure.
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Q JEE MAIN 2021
A transistor is connected in common emitter circuit configuration, the collector supply voltage is 10 V and the voltage drop...
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Q JEE-MAIN 2021
SOLVE THE FIG
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Q JEE MAIN 2021
For the circuit shown below, calculate the value of $\mathrm{I}_z:$
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Q JEE MAIN 2019
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Q JEE MAIN 2021
A zener diode having zener voltage 8 V and power dissipation rating of 0.5 W is connected across a potential...
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Q JEE MAIN 2021
In the given figure, each diode has a forward bias resistance of $30 \Omega$ and infinite resistance in reverse bias....
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Q JEE MAIN 2022
For a constant collector-emitter voltage of 8V, the collector current of a transistor reached to the value of 6 mA...
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Q JEE MAIN 2021
The typical output characteristics curve for a transistor working in the common-emitter configuration is shown in the figure. The estimated...
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Q JEE MAIN 2021
The correct relation between $\alpha$ (ratio of collector current to emitter current) and $\beta$ (ratio of collector current to base...
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Q JEE MAIN 2021
Which one of the following will be the output of the given circuit ?
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Q JEE Main 2019
Mobility of electrons in a semiconductor is defined as the ratio of their drift velocity to the applied electric field....
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Q JEE MAIN 2021
The following logic gate is equivalent to :
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Q JEE MAIN 2021
An npn transistor operates as a common emitter amplifier with a power gain of $10^6$. The input circuit resistance is...
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Q JEE_MAIN_2021
The output of the given combination gates represents :
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Q JEE MAIN 2021
The zener diode has a $V_z=30 \mathrm{~V}$. The current passing through the diode for the following circuit is $\_\_\_\_$ mA.
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Q JEE MAIN 2021
Match List I with List II.
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Q JEE MAIN 2021
In the logic circuit shown in the figure, if input A and B are 0 to 1 respectively, the output...
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Q JEE MAIN 2021
The value of power dissipated across the zener diode $\left(V_z=15 V\right)$ connected in the circuit as shown in the figure...
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Q JEE MAIN 2021
The truth table for the followng logic circuit is :
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Q JEE MAIN 2021
The circuit contains two diodes each with a forward resistance of $50 \Omega$ and with infinite reverse resistance. If the...
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Q JEE MAIN 2021
In connection with the circuit drawn below, the value of current flowing through $2 \mathrm{k} \Omega$ resistor is $\_\_\_\_$ $...
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Q JEE MAIN 2021
LED is constructed from Ga-As-P semiconducting material. The energy gap of this LED is 1.9 eV. Calculate the wavelength of...
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Q JEE MAIN 2021
Draw the output signal Y in the given combination of gates
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Q JEE MAIN 2021
If an emitter current is changed by 4 mA , the collector current changes by 3.5 mA . The value...
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Q JEE MAIN 2021
Zener breakdown occurs in a p-n junction having p and n both :
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Q JEE MAIN 2022
A 5 V battery is connected across the points $X$ and $Y$. Assume $D_1$ and $D_2$ to be normal silicon...
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Q JEE MAIN 2021
For extrinsic semiconductors; when doping level is increased;
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Q JEE MAIN 2021
The logic circuit shown above is equivalent to :
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Q JEE MAIN 2022
A Zener of breakdown voltage $\mathrm{V}_{\mathrm{Z}}=8 \mathrm{~V}$ and maximum zener current, $\mathrm{I}_{\mathrm{ZM}}=10 \mathrm{~mA}$ is subjected to an input voltage $...
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Q JEE MAIN 2022
In the given circuit the input voltage $\mathrm{V}_{\text {in }}$ is shown in figure. The cut-in voltage of $\mathrm{p}-\mathrm{n}$ junction...
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Q JEE MAIN 2022
A 8 V Zener diode along with a series resistance R is connected across a 20 V supply (as shown...
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Q JEE MAIN 2022
If the potential barrier across a p-n junction is 0.6 V . Then the electric field intensity, in the depletion...
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Q JEE Main 2022_
Identify the solar cell characteristics from the following options :
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Q JEE MAIN 2022
In the circuit shown below, maximum zener diode current will be ____mA
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Q JEE MAIN 2022
A logic gate circuit has two inputs A and B and output Y. The voltage waveforms of A, B and...
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Q JEE MAIN 2022
The cut-off voltage of the diodes (shown in figure) in forward bias is 0.6 V. The current through the resister...
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Q JEE MAIN 2022
A potential barrier of 0.4 V exists across a p-n junction. An electron enters the junction from the n-side with...
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Q JEE MAIN 2022
For a transistor to act as a switch, it must be operated in
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Q JEE MAIN 2022
In an experiment of CE configuration of n-p-n transistor, the transfer characteristics are observed as given in figure. If the...
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Q JEE MAIN 2022
Identify the logic operation performed by the given circuit :
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Q JEE MAIN 2022
In the given circuit- the value of current $\mathrm{I}_{\mathrm{L}}$ will be ______ mA. (When $\mathrm{R}_{\mathrm{L}}=\mathrm{lk} \Omega$
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Q JEE MAIN 2022
The positive feedback is required by an amplifier to act an oscillator. The feedback here means :
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Q JEE MAIN 2022
Identify the correct Logic Gate for the following output (Y) of two inputs A and B.
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Q JEE MAIN 2022
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 2022
A transistor is used in common-emitter mode in an amplifier circuit. When a signal of 10 mV is added to...
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Q JEE MAIN 2022
For using a multimeter to identify diode from electrical components. choose the correct statement out of the following about the...
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Q JEE MAIN 2022
The I-V characteristics of a p-n junction diode in forward bias is shown in the figure. The ratio of dynamic...
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Q JEE MAIN 2022
In the following circuit, the correct relation between output (Y) and inputs A and B will be :
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Q JEE MAIN 2022
A signal of 100 THz frequency can be transmitted with maximum efficiency by :
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Q JEE MAIN 2022
The photodiode is used to detect the optical signals. These diodes are preferably operated in reverse biased mode because.
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Q JEE MAIN 2024
The output of the given circuit diagram is
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Q JEE-Main_2025
The truth table for this given circuit is :
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Q JEE MAIN 2024
The truth table of the given circuit diagram is :
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Q JEE MAIN 2023
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion...
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Q JEE MAIN_2025
The truth table corresponding to the circuit given below is :
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Q JEE MAIN 2025
Consider a n-type semiconductor in which $n_e$ and $n_h$ are number of electrons and holes, respectively. (A) Holes are minority...
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Q
The logic operations performed by the given digital circuit is equivalent to:
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Q JEE MAIN 2023
The output from a NAND gate having inputs A and B given below will be.
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Q JEE MAIN 2023
The output from a NAND gate having inputs A and B given below will be.
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Q JEE MAIN 2023
For a given transistor amplifier circuit in CE configuration $\mathrm{V}_{c c}=1 \mathrm{~V}, \mathrm{R}_{\mathrm{G}}=1 \mathrm{k} \Omega, \mathrm{R}_{\mathrm{b}}=100 \mathrm{k} \Omega$ and $\beta=$...
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Q JEE MAIN 2023
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
Given below are two statements: Statement I: In a typical transistor, all three regions emitter, base and collector have same...
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Q JEE_ MAIN_2023
Statement I : When a Si sample is doped with Boron, it becomes P type and when doped by Arsenic...
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Q JEE MAIN_2023
For the given logic gates combination, the correct truth table will be
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Q JEE MAIN_2023
The logic gate equivalent to the given circuit diagram is :
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Q JEE MAIN 2023
From the given transfer characteristic of a transistor in CE configuration, the value of power gain of this configuration is...
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Q JEE MAIN 2023
For the following circuit and given inputs A and B, choose the correct option for output ‘Y’
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Q JEE MAIN 2023
In an $\mathrm{n}-\mathrm{p}-\mathrm{n}$ common emitter (CE) transistor the collector current changes from 5 mA to 16 mA for the change...
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Q JEE MAIN 2023
For the logic circuit shown, the output waveform at Y is:
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Q JEE MAIN 2023
The logic performed by the circuit shown in figure is equivalent to :
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Q JEE MAIN 2023
The resistivity $(\rho)$ of semiconductor varies with temperature. Which of the following curve represents the correct behaviour
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Q JEE MAIN 2023
Name the logic gate equivalent to the diagram attached
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Q JEE MAIN 2023
In the following circuit, the magnitude of current $l_1$, is $\_\_\_\_$ A.
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Q JEE MAINS 2023
Given below are two statements; one is labeled as Assertion A and the other is labelled as Reason R Assertion...
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Q JEE MAIN 2023
Which of the following statement is not correct in the case of light emitting diodes? A. It is a heavily...
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Q JEE MAIN 2023
The output waveform of the given logical circuit for the following inputs A and B as shown below, is
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Q JEE MAIN_2023
Match the List I with List II Choose the correct answer from the options given below:
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Q JEE MAIN 2023
The effect of increase in temperature on the number of electrons in conduction band (ne) and resistance of a semiconductor...
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Q JEE MAIN
The output Y of following circuit for given inputs is :
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Q JEE MAIN 2024
A light emitting diode (LED) is fabricated using GaAs semiconducting material whose band gap is 1.42eV. The wavelength of light...
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Q JEE MAIN
The correct truth table for the following logic circuit is :
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Q JEE MAIN 2024
The value of net resistance of the network as shown in the given figure is :
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Q JEE MAIN 2024
Following gates section is connected in a complete suitable circuit. For which of the following combination, bulb will glow (ON):
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Q JEE MAIN
In the given circuit if the power rating of Zener diode is 10" " mW, the value of series resistance...
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Q JEE-Main_2024
A Zener diode of breakdown voltage 10V is used as a voltage regulator as shown in the figure. The current...
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Q JEE MAIN 2024
In the given circuit, the breakdown voltage of the Zener diode is 3.0 V. What is the value of $I_z$...
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Q JEE MAIN 2025
In the digital circuit shown in the figure, for the given inputs the $P$ and $Q$ values are :
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Q JEE MAIN 2024
Which of the following circuits is reverse - biased ?
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Q JEE MAIN 2025
The truth table for the circuit given below is :
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Q JEE MAIN 2025
The Boolean expression ${\rm{Y}} = A\bar BC + \bar A\bar C$ can be realised with which of the following gate...
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Q JEE MAIN 2025
In the circuit shown here, assuming threshold voltage of diode is negligibly small, then voltage $V_{A B}$ is correctly represented...
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Q JEE MAIN 2025
Choose the correct logic circuit for the given truth table having inputs A and B.
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Q JEE MAIN 2025
The output of the circuit is low (zero) for : (A) $X=0, Y=0$ (B) $X=0, Y=1$ (C) $X=1, Y=0$ (D)...
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Q JEE MAIN 2025
In the following circuit, the reading of the ammeter will be ( Take Zener breakdown voltage = 4V)
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Q JEE MAIN 2025
A zener diode with 5 V zener voltage is used to regulate an unregulated dc voltage input of 25 V...
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Q JEE MAIN 2025
For the circuit shown above, equivalent GATE is :
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Q JEE MAIN 2025
Which of the following circuits has the same output as that of the given circuit?
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Q JEE MAIN 2025
Consider the following statements: A. The junction area of solar cell is made very narrow compared to a photo diode....
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Q JEE MAIN 2025
Refer to the circuit diagram given in the figure. which of the following observations are correct? A. Total resistance of...
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Q JEE MAIN 2025
What is the current through the battery in the circuit shown below ?
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Q JEE MAIN 2025
To obtain the given truth table, following logic gate should be placed at G :
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Q JEE MAIN 2025
Which of the following circuits represents a forward biased diode?
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