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Semiconductors — JEE Main & Advanced Physics PYQs

420 previous year questions from Semiconductors with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

420 questionsPhysicsSolutions on every page
1

The output Y for the given inputs A and B to the circuit is:

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Refer to the logic circuit given below. For two inputs (A=1, B=1) and (A=0, B=1) , output (Y) will be __________.

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The maximum rated power of the LED is 2 mW and it is used in the circuit with input voltage of 5 V as shown in the figure below. The current through resistance R_S is 0.5 mA. The m

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In a semiconductor p-n diode, the doping concentrations on p-side and n-side are 10¹⁵ atoms/cm ^3 and 10¹⁸ atoms/cm ^3 , respectively. Which one of the following statements is true

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For the given logic circuit, which of the following inputs combination will make both LED -1 and LED -2 to glow?

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: A diode under reverse-biased condition provides very small current

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A diode has Zener voltage of 10 V and maximum power dissipation of 0.5 W, then the minimum resistance to be used in series with this diode for safety when it is connected to a 25 V

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Two 4 bits binary numbers, A = 1101 and B = 1010 are given in the inputs of a logic circuit shown in figure below. The output (Y) will be:

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If X and Y are the inputs, the given circuit works as _______.

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For the given circuit (shown in part (A)) the time dependent input voltage v_ in (t) and corresponding output v_o(t) are shown in part (B) and part (C), respectively. Identify the

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Two p-n junction diodes D₁ and D₂ are connected as shown in figure. A and B are input signals and C is the output. The given circuit will function as a _ _ _ _ .

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Assuming in forward bias condition there is a voltage drop of 0.7 V across a silicon diode, the current through diode D₁ in the circuit is _ _ _ _ mA. (Assume all diodes in the giv

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Identify the correct truth table of the given logic circuit.

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A voltage regulating circuit consisting of Zener diode, having break-down voltage of 10 V and maximum power dissipation of 0.4 W, is operated at 15 V. The approximate value of prot

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For the given logic gate circuit, which of the following is the correct truth table?

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The following diagram shows a Zener diode as a voltage regulator. The Zener diode is rated at V_ z =5 ~V and the desired current in load is 5 mA. The unregulated voltage source can

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The correct truth table for the given input data of the following logic gate is : Inputs

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Find the correct combination of A , B , C and D inputs which can cause the LED to glow.

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The given circuit works as :

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The output voltage in the following circuit is (Consider ideal diode case)

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Consider the following logic circuit. The output is Y =0 when :

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In the following circuit, the reading of the ammeter will be (Take Zener breakdown voltage =4 ~V )

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Consider a n-type semiconductor in which n _ e and n _ h are number of electrons and holes, respectively. (A) Holes are minority carriers (B) The dopant is a pentavalent atom (C) n

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The Boolean expression Y = A B C + A C can be realised with which of the following gate configurations. A. One 3-input AND gate, 3 NOT gates and one 2input OR gate, One 2-input AND

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The truth table corresponding to the circuit given below is

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Choose the correct logic circuit for the given truth table having inputs A and B. array |c|c|c| Inputs & & Output A & B & Y 0 & 0 & 0 0 & 1 & 0 1 & 0 & 1 1 & 1 & 1 array

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In the digital circuit shown in the figure, for the given inputs the P and Q values are :

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A zener diode with 5 V zener voltage is used to regulate an unregulated dc voltage input of 25 V. For a 400 resistor connected in series, the zener current is found to be 4 times l

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The truth table for the circuit given below is :

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For the circuit shown above, equivalent GATE is :

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In the circuit shown here, assuming threshold voltage of diode is negligibly small, then voltage V_ A B is correctly represented by :

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Which of the following circuits has the same outpur as that of the given circuit?

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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) X =1, Y =1 Choose the correct answer from the options given below :

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Consider the following statements: A. The junction area of solar cell is made very narrow compared to a photo diode. B. Solar cells are not connected with any external bias. C. LED

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Refer to the circuit diagram given in the figure. which of the following observations are correct? A. Total resistance of circuit is 6 B. Current in Ammeter is 1 A C. Potential acr

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array c|c|c A & B & Y 0 & 0 & 1 0 & 1 & 1 1 & 0 & 0 1 & 1 & 1 array To obtain the given truth table, following logic gate should be placed at G:

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Which of the following circuits represents a forward biased diode? Choose the correct answer from the options given below :

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The I-V characteristics of an electronic device shown in the figure. The device is:

JEE Main 2024 Solution View → 39

In the truth table of the above circuit the value of X and Y are :

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A light emitting diode (LED) is fabricated using GaAs semiconducting material whose band gap is 1.42 eV . The wavelength of light emitted from the LED is :

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A potential divider circuit is connected with a dc source of 20 ~V , a light emitting diode of glow in voltage 1.8 ~V and a zener diode of breakdown voltage of 3.2 ~V . The length

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The output Y of following circuit for given inputs is :

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The acceptor level of a p-type semiconductor is 6 eV . The maximum wavelength of light which can create a hole would be : Given hc =1242 eV nm .

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The correct truth table for the following logic circuit is :

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The output (Y) of logic circuit given below is 0 only when :

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Following gates section is connected in a complete suitable circuit. For which of the following combination, bulb will glow (ON) :

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Identify the logic gate given in the circuit:

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Which of the diode circuit shows correct biasing used for the measurement of dynamic resistance of p-n junction diode :

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The value of net resistance of the network as shown in the given figure is :

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Conductivity of a photodiode starts changing only if the wavelength of incident light is less than 660 nm . The band gap of photodiode is found to be X 8 eV . The value of X is: (G

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In the given circuit if the power rating of Zener diode is 10 mW , the value of series resistance R s to regulate the input unregulated supply is:

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The output of the given circuit diagram is

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Identify the logic operation performed by the given circuit.

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In the given circuit, the voltage across load resistance ( R L ) is:

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A Zener diode of breakdown voltage 10 V is used as a voltage regulator as shown in the figure. The current through the Zener diode is

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The truth table for this given circuit is:

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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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The truth table of the given circuit diagram is :

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Which of the following circuits is reverse - biased ?

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The output from a NAND gate having inputs A and B given below will be,

JEE Main 2023 Solution View → 61

For the following circuit and given inputs A and B , choose the correct option for output ‘ Y ’

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From the given transfer characteristic of a transistor in CE configuration, the value of power gain of this configuration is 10 x , for R B = 10 kΩ , and R C = 1 kΩ . The

JEE Main 2023 Solution View → 63

In an n-p-n common emitter (CE) transistor the collector current changes from 5 mA to 16 mA for the change in base current from 100 μ A and 200 μ A , respectively. The cu

JEE Main 2023 Solution View → 64

The logic operations performed by the given digital circuit is equivalent to:

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The logic performed by the circuit shown in figure is equivalent to

JEE Main 2023 Solution View → 66

If each diode has a forward bias resistance of 25 Ω in the below circuit, Which of the following options is correct?

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A zener diode of power rating 1 . 6 W is to be used as voltage regulator. If the zener diode has a breakdown of 8 V and it has to regulate voltage fluctuating between 3 V and 10 V

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For a given transistor amplifier circuit in CE configuration V C C = 1 V , R C = 1 kΩ , R b = 100 kΩ and β = 100 . Value of base current I b is

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For the logic circuit shown, the output waveform at Y 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 A: Diffusion current in a p - n junction is greater than the drift cu

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Name the logic gate equivalent to the diagram attached

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The resistivity ( ρ ) of semiconductor varies with temperature. Which of the following curve represents the correct behaviour?

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Choose the correct statement about Zener diode:

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Match the List I with List II List I List II A Intrinsic Semiconductor I Fermi-level near valence band B n-type semiconductor II Fermi-level at middle of valence and conduction ban

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Given below are two statements: Statement I : In a typical transistor, all three regions emitter, base and collector have same doping level. Statement II : in a transistor, collect

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The effect of increase in temperature on the number of electrons in conduction band ( n e ) and resistance of a semiconductor will be as:

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The output Y for the inputs A and B of circuit is given by Truth table of the shown circuit is :

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The output waveform of the given logical circuit for the following inputs A and B as shown below, is

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For the given logic gates combination, the correct truth table will be

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Which 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 only when it is forward biased. C. It

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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 excess holes and N-type has ex

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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 bias usually for measuring the l

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The logic gate equivalent to the given circuit diagram 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 A : Photodiodes are preferably operated in reverse bias condition fo

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A 8 V Zener diode along with a series resistance R is connected across a 20 V supply (as shown in the figure). If the maximum Zener current is 25 mA , then the minimum value of R w

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If the potential barrier across a p - n junction is 0 . 6 V . Then the electric field intensity, in the depletion region having the width of 6 × 10 - 6 m , will be _____ &#215

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An n.p.n transistor with current gain β = 100 in common emitter configuration is shown in figure. The output voltage of the amplifier will be

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Identify the solar cell characteristics from the following options :

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For a constant collector-emitter voltage of 8 V , the collector current of a transistor reached to the value of 6 mA from 4 mA , whereas base current changed from 20 μ A to 25

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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

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The typical transfer characteristic of a transistor in CE configuration is shown in figure. A load resistor of 2   kΩ is connected in the collector branch of the circuit

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In the circuit shown below, maximum Zener diode current will be _____ mA .

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Two ideal diodes are connected in the network as shown in figure. The equivalent resistance between A and B is _____ Ω .

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In the circuit, the logical value of A = 1 or B = 1 when potential at A or B is 5 V and the logical value of A = 0 or B = 0 when potential at A or B is 0 V . The truth table of the

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The energy band gap of semiconducting material to produce violet (wavelength = 4000 Å ) LED is _____ eV . (Round off to the nearest integer).

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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 × 10 5 m s - 1 . The speed with which elect

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A transistor is used in an amplifier circuit in common emitter mode. If the base current changes by 100 μ A , it brings a change of 10 mA in collector current. If the load res

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In the given circuit the input voltage V in is shown in figure. The cut-in voltage of p - n junction diode ( D 1 or D 2 ) is 0 . 6 V . Which of the following output voltage V 0 wav

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A Zener of breakdown voltage V Z = 8 V and maximum Zener current, I ZM = 10 mA is subjected to an input voltage V i = 10 V with series resistance R = 100 Ω . In the given circ

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In the following circuit, the correct relation between output Y and inputs A and B will be

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For using a multimeter to identify diode from electrical components, choose the correct statement out of the following about the diode

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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 current than a p - n - p tran

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For a transistor to act as a switch, it must be operated in

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The cut-off voltage of the diodes (shown in figure) in forward bias is 0 . 6 V . The current through the resister of 40 Ω is _____ mA .

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Identify the correct Logic Gate for the following output Y of two inputs A and B .

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The positive feedback is required by an amplifier to act as an oscillator. The feedback here means

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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 voltage of 2 V and 4 V re

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As per the given circuit, the value of current through the battery will be _____ A.

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Identify the logic operation performed by the given circuit

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In an experiment of C E configuration of n - p - n transistor, the transfer characteristics are observed as given in figure. If the input resistance is 200 Ω and output resist

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The photodiode is used to detect the optical signals. These diodes are preferably operated in reverse biased mode because

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In the given circuit, the value of current I L will be _____ mA . (When R L = 1 kΩ )

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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 changes by 10 μ A and the co

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In the given figure, each diode has a forward bias resistance of 30 Ω and infinite resistance in reverse bias. The current I 1 will be :

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If V A and V B are the input voltages (either 5 V or 0 V ) and V 0 is the output voltage then the two gates represented in the following circuits A and B are :

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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 parallel to the load R L . State

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Choose the correct waveform that can represent the voltage across R of the following circuit, assuming the diode is ideal one:

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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 :

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For a transistor α and β are given as α = I C I E and β = I C I B . Then the correct relation between α and β will be:

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A zener diode of power rating 2 W is to be used as a voltage regulator. If the zener diode has a breakdown of 10 V and it has to regulate voltage fluctuated between 6 V and 14 V ,

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