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MCQ (Single Correct Answer)

JEE Main 2024 (Online) 1st February Evening Shift
To measure the temperature coefficient of resistivity $\alpha$ of a semiconductor, an electrical arrangement shown in the figure is prepared. The arm ...
JEE Main 2024 (Online) 1st February Morning Shift
In the given circuit if the power rating of Zener diode is $10 \mathrm{~mW}$, the value of series resistance $R_s$ to regulate the input unregulated s...
JEE Main 2024 (Online) 31st January Evening Shift
The output of the given circuit diagram is -...
JEE Main 2024 (Online) 31st January Morning Shift
Identify the logic operation performed by the given circuit. ...
JEE Main 2024 (Online) 30th January Evening Shift
In the given circuit, the voltage across load resistance (R$$_L$$) is :...
JEE Main 2024 (Online) 30th January Morning Shift
A Zener diode of breakdown voltage $$10 \mathrm{~V}$$ is used as a voltage regulator as shown in the figure. The current through the Zener diode is : ...
JEE Main 2024 (Online) 29th January Evening Shift
The truth table for this given circuit is : ...
JEE Main 2024 (Online) 29th January Morning Shift
In the given circuit, the breakdown voltage of the Zener diode is $$3.0 \mathrm{~V}$$. What is the value of $$\mathrm{I}_{\mathrm{z}}$$ ? ...
JEE Main 2024 (Online) 27th January Evening Shift
The truth table of the given circuit diagram is : ...
JEE Main 2024 (Online) 27th January Morning Shift
Which of the following circuits is reverse - biased?
JEE Main 2023 (Online) 15th April Morning Shift
In the given circuit, the current (I) through the battery will be ...
JEE Main 2023 (Online) 13th April Evening Shift
The output from NAND gate having inputs A and B given below will be, ...
JEE Main 2023 (Online) 13th April Morning Shift
For the following circuit and given inputs A and B, choose the correct option for output '$$Y$$' ...
JEE Main 2023 (Online) 12th April Morning Shift
In an n-p-n common emitter (CE) transistor the collector current changes from 5 $$\mathrm{mA}$$ to $$16 \mathrm{~mA}$$ for the change in base current ...
JEE Main 2023 (Online) 11th April Evening Shift
The logic operations performed by the given digital circuit is equivalent to: ...
JEE Main 2023 (Online) 11th April Morning Shift
The logic performed by the circuit shown in figure is equivalent to : ...
JEE Main 2023 (Online) 10th April Evening Shift
If each diode has a forward bias resistance of $$25 ~\Omega$$ in the below circuit, Which of the following options is correct :...
JEE Main 2023 (Online) 10th April Morning Shift
A zener diode of power rating 1.6 W is to be used as voltage regulator. If the zener diode has a breakdown of 8V and it has to regulate voltage fluctu...
JEE Main 2023 (Online) 8th April Evening Shift
For a given transistor amplifier circuit in $$\mathrm{CE}$$ configuration $$\mathrm{V}_{\mathrm{CC}}=1 \mathrm{~V}, \mathrm{R}_{\mathrm{C}}=1 ~\mathrm...
JEE Main 2023 (Online) 8th April Morning Shift
For the logic circuit shown, the output waveform at $$\mathrm{Y}$$ is: ...
JEE Main 2023 (Online) 6th April Evening Shift
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: Diffusion current in a p-n junction ...
JEE Main 2023 (Online) 6th April Morning Shift
Name the logic gate equivalent to the diagram attached ...
JEE Main 2023 (Online) 6th April Morning Shift
The resistivity $$(\rho)$$ of semiconductor varies with temperature. Which of the following curve represents the correct behaviour :
JEE Main 2023 (Online) 1st February Evening Shift
Choose the correct statement about Zener diode :
JEE Main 2023 (Online) 1st February Morning Shift
Match List I with List II: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-famil...
JEE Main 2023 (Online) 31st January Evening Shift
Given below are two statements : Statement I: In a typical transistor, all three regions emitter, base and collector have same doping level. Statement...
JEE Main 2023 (Online) 31st January Morning Shift
The effect of increase in temperature on the number of electrons in conduction band ($$\mathrm{n_e}$$) and resistance of a semiconductor will be as:...
JEE Main 2023 (Online) 30th January Evening Shift
The output $Y$ for the inputs $A$ and $B$ of circuit is given by Truth table of the shown circuit is:...
JEE Main 2023 (Online) 30th January Morning Shift
The output waveform of the given logical circuit for the following inputs A and B as shown below, is : ...
JEE Main 2023 (Online) 29th January Evening Shift
For the given logic gates combination, the correct truth table will be ...
JEE Main 2023 (Online) 29th January Morning Shift
Which one of the following statement is not correct in the case of light emitting diodes? A. It is a heavily doped p-n junction. B. It emits light onl...
JEE Main 2023 (Online) 25th January Evening Shift
Statement I : When a Si sample is doped with Boron, it becomes P type and when doped by Arsenic it becomes N-type semi conductor such that P-type has ...
JEE Main 2023 (Online) 25th January Morning Shift
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Photodiodes are used in forward bi...
JEE Main 2023 (Online) 24th January Evening Shift
The logic gate equivalent to the given circuit diagram is :...
JEE Main 2023 (Online) 24th January Morning Shift
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Photodiodes are preferably operate...
JEE Main 2022 (Online) 28th July Evening Shift
An n.p.n transistor with current gain $$\beta=100$$ in common emitter configuration is shown in figure. The output voltage of the amplifier will be ...
JEE Main 2022 (Online) 28th July Morning Shift
Identify the solar cell characteristics from the following options :
JEE Main 2022 (Online) 27th July Evening Shift
For a constant collector-emitter voltage of $$8 \mathrm{~V}$$, the collector current of a transistor reached to the value of $$6 \mathrm{~mA}$$ from $...
JEE Main 2022 (Online) 27th July Morning Shift
A logic gate circuit has two inputs A and B and output Y. The voltage waveforms of A, B and Y are shown below. The logic gate circuit is :...
JEE Main 2022 (Online) 25th July Morning Shift
In the circuit, the logical value of $$A=1$$ or $$B=1$$ when potential at $$A$$ or $$B$$ is $$5 \mathrm{~V}$$ and the logical value of $$A=0$$ or $$B=...
JEE Main 2022 (Online) 28th June Evening Shift
In the given circuit the input voltage Vin is shown in figure. The cut-in voltage of p-n junction diode (D1 or D2) is 0.6 V. Which of the following ou...
JEE Main 2022 (Online) 28th June Morning Shift
In the following circuit, the correct relation between output (Y) and inputs A and B will be : ...
JEE Main 2022 (Online) 28th June Morning Shift
For using a multimeter to identify diode from electrical components, choose the correct statement out of the following about the diode :
JEE Main 2022 (Online) 28th June Morning Shift
Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : n-p-n transistor permits more cur...
JEE Main 2022 (Online) 27th June Evening Shift
For a transistor to act as a switch, it must be operated in
JEE Main 2022 (Online) 27th June Morning Shift
Identify the correct Logic Gate for the following output (Y) of two inputs A and B. ...
JEE Main 2022 (Online) 26th June Evening Shift
The positive feedback is required by an amplifier to act an oscillator. The feedback here means :
JEE Main 2022 (Online) 26th June Morning Shift
The I-V characteristics of a p-n junction diode in forward bias is shown in the figure. The ratio of dynamic resistance, corresponding to forward bias...
JEE Main 2022 (Online) 25th June Evening Shift
Identify the logic operation performed by the given circuit: ...
JEE Main 2022 (Online) 25th June Morning Shift
The photodiode is used to detect the optical signals. These diodes are preferably operated in reverse biased mode because :
JEE Main 2021 (Online) 1st September Evening Shift
In the given figure, each diode has a forward bias resistance of 30$$\Omega$$ and infinite resistance in reverse bias. The current I1 will be :...
JEE Main 2021 (Online) 31st August Evening Shift
If VA and VB are the input voltages (either 5V or 0V) and V0 is the output voltage then the two gates represented in the following circuit (A) and (B)...
JEE Main 2021 (Online) 31st August Evening Shift
Statement - I :To get a steady dc output from the pulsating voltage received from a full wave rectifier we can connect a capacitor across the output p...
JEE Main 2021 (Online) 31st August Morning Shift
In the following logic circuit the sequence of the inputs A, B are (0, 0), (0, 1), (1, 0) and (1, 1). The output Y for this sequence will be :...
JEE Main 2021 (Online) 31st August Morning Shift
Choose the correct waveform that can represent the voltage across R of the following circuit, assuming the diode is ideal one :...
JEE Main 2021 (Online) 27th August Evening Shift
For a transistor $$\alpha$$ and $$\beta$$ are given as $$\alpha = {{{I_C}} \over {{I_E}}}$$ and $$\beta = {{{I_C}} \over {{I_B}}}$$. Then the correc...
JEE Main 2021 (Online) 27th August Morning Shift
For a transistor in CE mode to be used as an amplifier, it must be operated in :
JEE Main 2021 (Online) 26th August Evening Shift
Four NOR gates are connected as shown in figure. The truth table for the given figure is :...
JEE Main 2021 (Online) 26th August Morning Shift
Identify the logic operation carried out by the given circuit :-...
JEE Main 2021 (Online) 26th August Morning Shift
Statement I : By doping silicon semiconductor with pentavalent material, the electrons density increases.Statement II : The n-type semiconductor has n...
JEE Main 2021 (Online) 27th July Evening Shift
Find the truth table for the function Y of A and B represented in the following figure....
JEE Main 2021 (Online) 25th July Morning Shift
Identify the logic operation carried out....
JEE Main 2021 (Online) 22th July Evening Shift
Consider a situation in which reserve biased current of a particular P-N junction increases when it is exposed to a light of wavelength $$\le$$ 621 nm...
JEE Main 2021 (Online) 20th July Morning Shift
For the circuit shown below, calculate the value of Iz :...
JEE Main 2021 (Online) 18th March Evening Shift
The correct relation between $$\alpha$$ (ratio of collector current to emitter current) and $$\beta$$ (ratio of collector current to base current) of ...
JEE Main 2021 (Online) 17th March Evening Shift
Which one of the following will be the output of the given circuit?...
JEE Main 2021 (Online) 17th March Morning Shift
The output of the given combination gates represents :...
JEE Main 2021 (Online) 16th March Evening Shift
The following logic gate is equivalent to :...
JEE Main 2021 (Online) 26th February Evening Shift
Draw the output signal Y in the given combination of gates....
JEE Main 2021 (Online) 26th February Morning Shift
LED is constructed from Ga-As-P semiconducting material. The energy gap of this LED is 1.9 eV. Calculate the wavelength of light emitted and its colou...
JEE Main 2021 (Online) 25th February Evening Shift
For extrinsic semiconductors; when doping level is increased;
JEE Main 2021 (Online) 25th February Evening Shift
The truth table for the following logic circuit is :...
JEE Main 2021 (Online) 25th February Morning Shift
A 5V battery is connected across the points X and Y. Assume D1 and D2 to be normal silicon diodes. Find the current supplied by the battery if the +ve...
JEE Main 2021 (Online) 24th February Evening Shift
The logic circuit shown above is equivalent to :...
JEE Main 2021 (Online) 24th February Evening Shift
Given below are two statements :Statement I : PN junction diodes can be used to function as transistor, simply by connecting two diodes, back to back,...
JEE Main 2021 (Online) 24th February Evening Shift
Zener breakdown occurs in a p $$-$$ n junction having p and n both :
JEE Main 2021 (Online) 24th February Morning Shift
If an emitter current is changed by 4 mA, the collector current changes by 3.5 mA. The value of $$\beta$$ will be :
JEE Main 2020 (Online) 6th September Morning Slot
Identify the correct output signal Y in the given combination of gates (as shown) for the given inputs A and B. ...
JEE Main 2020 (Online) 5th September Evening Slot
Two Zener diodes (A and B) having breakdown voltages of 6 V and 4 V respectively, are connected as shown in the circuit below. The output voltage V0 v...
JEE Main 2020 (Online) 5th September Morning Slot
With increasing biasing voltage of a photodiode, the photocurrent magnitude :
JEE Main 2020 (Online) 4th September Evening Slot
Identify the operation performed by the circuit given below : ...
JEE Main 2020 (Online) 4th September Morning Slot
Take the breakdown voltage of the zener diode used in the given circuit as 6V. For the input voltage shown in figure below, the time variation of the ...
JEE Main 2020 (Online) 3rd September Evening Slot
If a semiconductor photodiode can detect a photon with a maximum wavelength of 400 nm, then its band gap energy is : Planck’s constant h = 6.63 $$ \ti...
JEE Main 2020 (Online) 3rd September Evening Slot
Which of the following will NOT be observed when a multimeter (operating in resistance measuring mode) probes connected across a component, are just r...
JEE Main 2020 (Online) 3rd September Morning Slot
When a diode is forward biased, it has a voltage drop of 0.5 V. The safe limit of current through the diode is 10 mA. If a battery of emf 1.5 V is use...
JEE Main 2020 (Online) 2nd September Evening Slot
In the following digital circuit, what will be the output at ‘Z’, when the input (A, B) are (1, 0), (0, 0), (1, 1,), (0, 1) ...
JEE Main 2020 (Online) 9th January Evening Slot
The current i in the network is : ...
JEE Main 2020 (Online) 9th January Evening Slot
Two identical capacitors A and B, charged to the same potential 5V are connected in two different circuits as shown below at time t = 0. If the charge...
JEE Main 2020 (Online) 8th January Evening Slot
In the given circuit, value of Y is : ...
JEE Main 2020 (Online) 8th January Morning Slot
Boolean relation at the output stage-Y for the following circuit is : ...
JEE Main 2020 (Online) 7th January Evening Slot
In the figure, potential difference between A and B is : ...
JEE Main 2020 (Online) 7th January Morning Slot
Which of the following gives a reversible operation?
JEE Main 2019 (Online) 12th April Evening Slot
Figure shows a DC voltage regulator circuit, with a Zener diode of breakdown voltage = 6V. If the unregulated input voltage varies between 10 V to 16 ...
JEE Main 2019 (Online) 12th April Morning Slot
The truth table for the circuit given in the fig. is: ...
JEE Main 2019 (Online) 12th April Morning Slot
The transfer characteristic curve of a transistor, having input and output resistance 100 $$\Omega $$ and 100 k$$\Omega $$ respectively is shown in th...
JEE Main 2019 (Online) 10th April Evening Slot
The figure represents a voltage regulator circuit using a Zener diode. The breakdown voltage of the Zener diode is 6 V and the load resistance is, RL ...
JEE Main 2019 (Online) 10th April Morning Slot
An n-p-n transistor operates as a common emitter amplifier, with a power gain of 60 dB. The input circuit resistance is 100$$\Omega $$ and the output ...
JEE Main 2019 (Online) 9th April Evening Slot
The logic gate equivalent to the given logic circuit is :- ...
JEE Main 2019 (Online) 9th April Morning Slot
An NPN transistor is used in common emitter configuration as an amplifier with 1 k$$\Omega $$ load resistance. Signal voltage of 10 mV is applied acro...
JEE Main 2019 (Online) 8th April Evening Slot
A common emitter amplifier circuit, built using an npn transistor, is shown in the figure. Its dc current gain is 250, RC = 1k$$\Omega$$ and VCC = 10 ...
JEE Main 2019 (Online) 8th April Morning Slot
The reverse breakdown voltage of a Zener diode is 5.6 V in the given circuit. The current IZ through the Zener is : ...
JEE Main 2019 (Online) 12th January Evening Slot
In the figure, given that VBB supply can vary from 0 to 5.0 V, VCC = 5V, $$\beta $$dc = 200, RB = 100 k$$\Omega $$, RC = 1 k$$\Omega $$ and VBE = 1.0 ...
JEE Main 2019 (Online) 12th January Morning Slot
The output of the given logic circuit is : ...
JEE Main 2019 (Online) 11th January Evening Slot
The circuit shown below contains two ideal diodes, each with a forward resistance of 50 $$\Omega $$. If the battery voltage is 6 V, the current throug...
JEE Main 2019 (Online) 11th January Morning Slot
In the given circuit the current through Zener Diode is close to: ...
JEE Main 2019 (Online) 10th January Evening Slot
For the circuit shown below, the current through the Zener diode is - ...
JEE Main 2019 (Online) 10th January Morning Slot
To get output 1 at R, for the given logic gate circuit the input values must be ...
JEE Main 2019 (Online) 9th January Evening Slot
Ge and Si diodes start conducting at 0.3 V and 0.7 V respectively. In the following figure if Ge diode connection are reversed, the value of V0 change...
JEE Main 2019 (Online) 9th January Morning Slot
Mobility of electrons in a semiconductor is defined as the ratio of their drift velocity to the applied electric field. If, for an n-type semiconducto...
JEE Main 2018 (Online) 16th April Morning Slot
In the given circuit, the current through zener diode is : ...
JEE Main 2018 (Offline)
The reading of the ammeter for a silicon diode in the given circuit is : ...
JEE Main 2018 (Online) 15th April Evening Slot
Truth table for the following digital circuit will be : ...
JEE Main 2018 (Online) 15th April Morning Slot
In a common emitter configuration with suitable bias, it is given that $${R_L}$$ is the load resistance and $${R_{BE}}$$ is small signal dynamic resi...
JEE Main 2017 (Online) 9th April Morning Slot
The current gain of a common emitter amplifier is 69. If the emitter current is 7.0 mA, collector current is :
JEE Main 2017 (Online) 8th April Morning Slot
What is the conductivity of a semiconductor sale having electron concentration of $$5 \times {10^{18}}\,\,{m^{ - 3}},$$ hole concentration of $$5 \ti...
JEE Main 2017 (Online) 8th April Morning Slot
The V-I characteristic of a diode is shown in the figure. The ratio of forward to reverse bias resistance is : ...
JEE Main 2017 (Offline)
In a common emitter amplifier circuit using an n-p-n transistor, the phase difference between the input and the output voltages will be:
JEE Main 2016 (Online) 10th April Morning Slot
The ratio (R) of output resistance r0, and the input resistance ri in measurements of input and output characteristics of a transistor is typically in...
JEE Main 2016 (Online) 10th April Morning Slot
To get an output of 1 from the circuit shown in figure the input must be : ...
JEE Main 2016 (Online) 10th April Morning Slot
A realistic graph depicting the variation of the reciprocal of input resistance in an input characteristics measurement in a commonemitter transistor ...
JEE Main 2016 (Online) 9th April Morning Slot
The truth table given in fig. represents : .tg {border-collapse:collapse;border-spacing:0;width:100%} .tg td{font-family:Arial, sans-serif;font-size...
JEE Main 2016 (Online) 9th April Morning Slot
An unknown transistor needs to be identified as a npn or pnp type. A multimeter, with + ve and − ve terminals, is used to measure resistance between d...
JEE Main 2016 (Online) 9th April Morning Slot
An experiment is performed to determine the I - V characteristics of a Zener diode, which has a protective resistance of R = 100 $$\Omega $$, and a ma...
JEE Main 2016 (Offline)
The temperature dependence of resistance of $$Cu$$ and undoped $$Si$$ in the temperature range $$300-400$$ $$K,$$ is best described by :
JEE Main 2016 (Offline)
If $$a, b, c, d$$ are inputs to a gate and $$x$$ is its output, then, as per the following time graph, the gate is : ...
JEE Main 2016 (Offline)
Identify the semiconductor devices whose characteristics are given below, in the order $$(a), (b), (c), (d)$$ : ...
JEE Main 2015 (Offline)
A red $$LED$$ emits light at $$0.1$$ watt uniformly around it. The amplitude of the electric field of the light at a distance of $$1$$ $$m$$ from the ...
JEE Main 2014 (Offline)
The current voltage relation of diode is given by $${\rm I} = \left( {{e^{100V/T}} - 1} \right)mA,$$ where the applied voltage $$V$$ is in volts and t...
JEE Main 2014 (Offline)
The forward biased diode connection is:
JEE Main 2013 (Offline)
A diode detector is used to detect an amplitude modulated wave of $$60\% $$ modulation by using a condenser of capacity $$250$$ picofarad in parallel ...
JEE Main 2013 (Offline)
The $${\rm I}$$-$$V$$ characteristic of an $$LED$$ is
AIEEE 2012
Truth table for system of four $$NAND$$ gates as shown in figure is: ...
AIEEE 2010
The combination of gates shown below yields ...
AIEEE 2009
The logic circuit shown below has the input waveforms $$'A'$$ and $$'B'$$ as shown. Pick out the correct output waveform. Output is ...
AIEEE 2009
A $$p$$-$$n$$ junction $$(D)$$ shown in the figure can act as a rectifier. An alternating current source $$(V)$$ is connected in the circuit. The cur...
AIEEE 2008
A working transistor with its three legs marked $$P,Q$$ and $$R$$ is tested using a multi-meter. No conduction is found between $$P$$ and $$Q$$. By co...
AIEEE 2008
In the circuit below, $$A$$ and $$B$$ represent two inputs and $$C$$ represents the output. The circuit represents...
AIEEE 2007
Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate ?
AIEEE 2007
If in a $$p$$-$$n$$ junction diode, a square input signal of $$10$$ $$V$$ is applied as shown Then the output signal across $${R_L}$$ will be ...
AIEEE 2006
In a common base mode of a transistor, the collector current is $$5.488$$ $$mA$$ for an emitter current of $$5.60mA.$$ The value of the base current a...
AIEEE 2006
If the ratio of the concentration of electrons to that of holes in a semiconductor is $${7 \over 5}$$ and the ratio of currents is $${7 \over 4},$$ th...
AIEEE 2006
A solid which is not transparent to visible light and whose conductivity increases with temperature is formed by
AIEEE 2006
The circuit has two oppositively connected ideal diodes in parallel. What is the current following in the circuit? ...
AIEEE 2006
In the following, which one of the diodes is reverse biased?
AIEEE 2006
If the lattice constant of this semiconductor is decreased, then which of the following is correct? ...
AIEEE 2005
The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than $$2480$$ $$nm$$ is incident on it. ...
AIEEE 2005
In a full wave rectifier circuit operating from $$50$$ $$Hz$$ mains frequency, the fundamental frequency in the ripple would be
AIEEE 2005
In a common base amplifier, the phase difference between the input signal voltage and output voltage is
AIEEE 2004
When $$npn$$ transistor is used as an amplifer
AIEEE 2004
A piece of copper and another of germanium are cooled from room temperature to $$77K,$$ the resistance of
AIEEE 2004
The manifestation of band structure in solids is due to
AIEEE 2004
For a transistor amplifier in common emitter configuration for load impedance of $$1k\,\Omega $$ $$\left( {{h_{fe}} = 50} \right.$$ and $$\left. {{h_{...
AIEEE 2004
When $$p$$-$$n$$ junction diode is forward biased then
AIEEE 2003
A strip of copper and another of germanium are cooled from room temperature to $$80K.$$ The resistance of
AIEEE 2003
The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the difference in the
AIEEE 2003
In the middle of the depletion layer of a reverse- biased $$p$$-$$n$$ junction, the
AIEEE 2002
At absolute zero, Si acts as
AIEEE 2002
By increasing the temperature, the specific resistance of a conductor and a semiconductor
AIEEE 2002
The energy band gap is maximum in
AIEEE 2002
The part of a transistor which is most heavily doped to produce large number of majority carriers is

Numerical

JEE Main 2023 (Online) 13th April Morning Shift
From the given transfer characteristic of a transistor in $$\mathrm{CE}$$ configuration, the value of power gain of this configuration is $$10^{x}$$, ...
JEE Main 2022 (Online) 29th July Evening Shift
A $$8 \mathrm{~V}$$ Zener diode along with a series resistance $$\mathrm{R}$$ is connected across a $$20 \mathrm{~V}$$ supply (as shown in the figure)...
JEE Main 2022 (Online) 29th July Morning Shift
If the potential barrier across a p-n junction is $$0.6 \mathrm{~V}$$. Then the electric field intensity, in the depletion region having the width of ...
JEE Main 2022 (Online) 26th July Evening Shift
The typical transfer characteristics of a transistor in CE configuration is shown in figure. A load resistor of $$2 \,k \Omega$$ is connected in the c...
JEE Main 2022 (Online) 26th July Morning Shift
In the circuit shown below, maximum zener diode current will be _________ $$\mathrm{mA}$$. ...
JEE Main 2022 (Online) 25th July Evening Shift
Two ideal diodes are connected in the network as shown in figure. The equivalent resistance between A and B is __________ $$\Omega$$. ...
JEE Main 2022 (Online) 25th July Morning Shift
The energy band gap of semiconducting material to produce violet (wavelength = 4000$$\mathop A\limits^o $$ ) LED is ______________ $$\mathrm{eV}$$. (R...
JEE Main 2022 (Online) 30th June Morning Shift
The circuit diagram used to study the characteristic curve of a zener diode is connected to variable power supply (0 $$-$$ 15 V) as shown in figure. A...
JEE Main 2022 (Online) 29th June Evening Shift
A potential barrier of 0.4 V exists across a p-n junction. An electron enters the junction from the n-side with a speed of 6.0 $$\times$$ 105 ms$$-$$1...
JEE Main 2022 (Online) 29th June Morning Shift
A transistor is used in an amplifier circuit in common emitter mode. If the base current changes by 100 $$\mu$$A, it brings a change of 10 mA in colle...
JEE Main 2022 (Online) 28th June Evening Shift
A zener of breakdown voltage Vz = 8 V and maximum zener current, IZM = 10 mA is subjectd to an input voltage Vi = 10 V with series resistance R = 100 ...
JEE Main 2022 (Online) 27th June Evening Shift
The cut-off voltage of the diodes (shown in figure) in forward bias is 0.6 V. The current through the resister of 40 $$\Omega$$ is __________ mA. ...
JEE Main 2022 (Online) 26th June Morning Shift
As per the given circuit, the value of current through the battery will be ____________ A. ...
JEE Main 2022 (Online) 25th June Evening Shift
In an experiment of CE configuration of n-p-n transistor, the transfer characteristics are observed as given in figure. If the input resistance is 200...
JEE Main 2022 (Online) 24th June Evening Shift
In the given circuit, the value of current IL will be ____________ mA. (When RL = 1k$$\Omega$$) ...
JEE Main 2022 (Online) 24th June Morning Shift
A transistor is used in common-emitter mode in an amplifier circuit. When a signal of 10 mV is added to the base-emitter voltage, the base current cha...
JEE Main 2021 (Online) 27th August Evening Shift
A zener diode of power rating 2W is to be used as a voltage regulator. If the zener diode has a breakdown of 10 V and it has to regulate voltage fluct...
JEE Main 2021 (Online) 27th August Morning Shift
A circuit is arranged as shown in figure. The output voltage V0 is equal to ................... V....
JEE Main 2021 (Online) 26th August Evening Shift
For the given circuit, the power across Zener diode is .............. mW....
JEE Main 2021 (Online) 27th July Morning Shift
A transistor is connected in common emitter circuit configuration, the collector supply voltage is 10 V and the voltage drop across a resistor of 1000...
JEE Main 2021 (Online) 25th July Evening Shift
In a semiconductor, the number density of intrinsic charge carries at 27$$^\circ$$C is 1.5 $$\times$$ 1016/m3. If the semiconductor is doped with impu...
JEE Main 2021 (Online) 22th July Evening Shift
In a given circuit diagram, a 5 V zener diode along with a series resistance is connected across a 50 V power supply. The minimum value of the resista...
JEE Main 2021 (Online) 20th July Evening Shift
A zener diode having zener voltage 8 V and power dissipation rating of 0.5 W is connected across a potential divider arranged with maximum potential d...
JEE Main 2021 (Online) 20th July Evening Shift
For the forward biased diode characteristics shown in the figure, the dynamic resistance at ID = 3 mA will be __________ $$\Omega$$....
JEE Main 2021 (Online) 18th March Evening Shift
The typical output characteristics curve for a transistor working in the common-emitter configuration is shown in the figure.The estimated current gai...
JEE Main 2021 (Online) 18th March Morning Shift
An npn transistor operates as a common emitter amplifier with a power gain of 106. The input circuit resistance is 100$$\Omega$$ and the output load r...
JEE Main 2021 (Online) 16th March Morning Shift
The value of power dissipated across the zener diode (Vz = 15V) connected in the circuit as shown in the figure is x $$\times$$ 10$$-$$1 watt.The valu...
JEE Main 2021 (Online) 16th March Morning Shift
In the logic circuit shown in the figure, if input A and B are 0 to 1 respectively, the output at Y would be 'x'.The value of x is ____________. ...
JEE Main 2021 (Online) 26th February Evening Shift
The zener diode has a Vz = 30V. The current passing through the diode for the following circuit is ________ mA....
JEE Main 2021 (Online) 26th February Morning Shift
The circuit contains two diodes each with a forward resistance of 50$$\Omega$$ and with infinite reverse resistance. If the battery voltage is 6V, the...
JEE Main 2021 (Online) 24th February Morning Shift
In connection with the circuit drawn below, the value of current flowing through 2 k$$\Omega$$ resistor is _________ $$\times$$ 10$$-$$4 A....
JEE Main 2020 (Online) 6th September Evening Slot
The output characteristics of a transistor is shown in the figure. When VCE is 10V and IC = 4.0 mA, then value of $$\beta $$ac is __________. ...
JEE Main 2020 (Online) 9th January Evening Slot
The circuit shown below is working as a 8 V dc regulated voltage source. When 12 V is used as input, the power dissipated (in mW) in each diode is; (c...
JEE Main 2020 (Online) 9th January Morning Slot
Both the diodes used in the circuit shown are assumed to be ideal and have negligible resistance when these are forward biased. Built in potential in ...

MCQ (More than One Correct Answer)

JEE Main 2016 (Offline)
For a common emitter configuration, if $$\alpha $$ and $$\beta $$ have their usual meanings, the incorrect relationship between $$\alpha $$ and $$\bet...
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