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Electronics Questions

Practice 41 Electronics questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

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41
Total Questions
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20
Easy
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19
Medium
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2
Hard
Practice by Exam:Physics(41)

About electronics — practice questions, PYQs & concepts

electronics is a frequently-tested topic on Physics. ExamTest.live currently lists 41 electronics questions spanning previous-year papers from 2026 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year — every answer key is free, no sign-up required.

electronics weight in competitive exams

Across our electronics question bank, the largest sources are Physics (41). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

  • Start easy: 20 easy electronics questions are available — build fluency before moving up.
  • Target weak years: Use the year filter to focus on the most recent 2026 paper or older PYQs you have not attempted.
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  • Read every explanation: Even on questions you got right — the explanation often surfaces a faster approach you can reuse.

All Electronics Questions(1–41 of 41)

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Q1easymcqPhysicsAIEEE 20042026
0% accuracy
When a p-n junction diode is forward biased:
Q2easymcqPhysicsAIEEE 20042026
0% accuracy
The manifestation of band structure in solids is due to:
Q3easymcqPhysicsAIEEE 20042026
50% accuracy
A piece of copper and another of germanium are cooled from room temperature to . The resistance of:
Q4mediummcqPhysicsAIEEE 20042026
0% accuracy
For a transistor amplifier in common emitter configuration having load impedance of ( and ), the current gain is:
Q5easymcqPhysicsAIEEE 20042026
0% accuracy
When an npn transistor is used as an amplifier:
Q6easymcqPhysicsAIEEE2026
In a common base amplifier, the phase difference between the input signal voltage and output voltage is:
Q7mediummcqPhysicsNEET 20212026
For the given circuit, the input digital signals are applied at the terminals and . What would be the output at the terminal ?
image
Options:
image
image
Q8easymcqPhysicsNEET 20222026
In half wave rectification, if the input frequency is , then the output frequency would be:
Q9mediummcqPhysicsNEET 20222026
In the given circuits (a), (b) and (c), the potential drop across the two p-n junctions are equal in:
image
Q10hardmcqPhysicsNEET 20222026
The truth table for the given logic circuit is:
image

image
Q11easymcqPhysicsNEET 20232026
Given below are two statements:Statement I: Photovoltaic devices can convert optical radiation into electricity.Statement II: Zener diode is designed to operate under reverse bias in breakdown region.In the light of the above statements, choose the most appropriate answer:
Q12easymcqPhysicsNEET 20232026
A full wave rectifier circuit consists of two p-n junction diodes, a centre-tapped transformer, a capacitor and a load resistance. Which of these components removes the AC ripple from the rectified output?
Q13hardmcqPhysicsNEET 20232026
For the following logic circuit, the truth table is:
image
Q14mediummcqPhysicsNEET (UG) 20242026
A logic circuit provides the output as per the following truth table: image The expression for the output is:
Q15mediummcqPhysicsNEET (UG) 20242026
The output () of the given logic gate is similar to the output of an/a:
image
Q16mediummcqPhysicsNEET (UG) 20242026
Consider the following statements A and B and identify the correct answer:A. For a solar-cell, the I-V characteristics lies in the IV quadrant of the given graph.B. In a reverse biased pn junction diode, the current measured in (), is due to majority charge carriers.
image
Q17easymcqPhysicsNEET 20212026
Consider the following Statements (A) and (B) and identify the correct answer.A. A zener diode is connected in reverse bias, when used as a voltage regulator.B. The potential barrier of p-n junction lies between to .
Q18easymcqPhysicsAIEEE2026
In a full wave rectifier circuit operating from mains frequency, the fundamental frequency in the ripple would be:
Q19mediummcqPhysicsAIEEE2026
A working transistor with legs marked P, Q and R is tested. No conduction is found between P and Q. Connecting the negative terminal of the multimeter to R and positive to P or Q shows some resistance. Which is true?
Q20easymcqPhysicsAIEEE2026
A circuit has two inputs A and B and output C. The truth table shows C is 0 only when both A and B are 0, and C is 1 otherwise. This circuit represents:
Q21mediummcqPhysicsAIEEE2026
A logic gate circuit has two inputs and . Both are passed through NOT gates, then through a NAND gate, and finally through another NOT gate. This combination yields:
image
Q22easymcqPhysicsNEET 20212026
The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.
Q23mediummcqPhysicsPhysics
0% accuracy
Zener diode is used for :
Q24mediummcqPhysicsPhysics
0% accuracy
Application of a forward bias to a p-n junction :
Q25mediummcqPhysicsPhysics
0% accuracy
A photosensitive metallic surface has work function, hv0. If photons of energy 2hv0 fall on this surface, the electrons come out with a maximum velocity of 4 x 10^6 m/s. When the photon energy is increased to 5hv0, then maximum velocity of photoelectrons will be :
Q26easymcqPhysicsPhysics
The given graph represents V-I characteristic for a semiconductor device. Which of the following statement is correct?
Q27easymcqPhysicsPhysics
The output () of a NAND gate followed by a NOT gate is equivalent to:
image
Q28mediummcqPhysicsPhysics
In a CE amplifier, the transistor used has transconductance . If replaced with another having transconductance , the voltage gain becomes:
Q29easymcqPhysicsPhysics
In a n-type semiconductor, which of the following is true?
Q30easymcqPhysicsPhysics
and both have same lattice structure, having bonding electrons in each. However, is insulator whereas is intrinsic semiconductor. This is because:
Q31easymcqPhysicsPhysics
Transfer characteristics [output voltage() vs input voltage ()] for a base biased transistor in CE configuration is as shown in the figure. For using transistor as a switch, it is used:
image
Q32mediummcqPhysicsPhysics
The figure shows a logic circuit with two inputs and and the output . The voltage wave forms across and are as given. The logic circuit gate is:
image
Q33easymcqPhysicsPhysics
Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is:
image
Q34mediummcqPhysicsPhysics
In a CE (Common Emitter) transistor amplifier, the audio signal voltage across the collector resistance of is . If the base resistance is and the current amplification of the transistor is , the input signal voltage is:
Q35mediummcqPhysicsPhysics
To get an output from the circuit shown below, the input must be ():
image
Q36easymcqPhysicsPhysics
The device that can act as a complete electronic circuit is:
Q37mediummcqPhysicsPhysics
The circuit shown is equivalent to:
Q38mediummcqPhysicsPhysics
The voltage gain of an amplifier with negative feedback is . The voltage gain without feedback will be:
Q39mediummcqPhysicsPhysics
Application of a forward bias to a p-n junction :
Q40easymcqPhysicsPhysics
The barrier potential of a p-n junction depends on: (a) type of semiconductor material (b) amount of doping (c) temperature. Which one of the following is correct?
Q41mediummcqPhysicsPhysics
The input signal given to a CE amplifier having a voltage gain of is . The corresponding output signal will be:

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