NEET Physics MCQs for Electronic Devices Chapter, Year Wise MCQs Added Here -

The preparation phase for the NEET 2026 exam is on. All the students who are in their class 12th or are preparing for the exam must now start reading about all the chapters and topics mentioned in the NEET Syllabus 2026. Physics, being one of the most prominent and important part of the NEET Exam requires sheer dedication and attention from the aspirants. Therefore, in this series of NEET Physics MCQs, we have got the NEET Physics MCQs for Electronic Devices Chapter in the article below so that all the aspirants studying this chapter can complete their preparations for the chapter by solving more and more MCQs.

NEET Physics MCQs for Electronic Devices Chapter

An “Electronic Devices” chapter typically covers fundamental components like semiconductors, diodes, and transistors, explaining their internal mechanisms and how they are used for functions such as signal amplification and switching. Key topics often include the energy band theory of solids, PN-junctions, the operation and characteristics of diodes like Zener diodes and LEDs, different types of transistors (BJTs, FETs), and basic logic gates. The chapter also introduces the concepts of analog and digital signals and may touch on their practical applications in circuits.

Important Topics in Electronic Devices for NEET

Electronic Devices is a scoring chapter in NEET Physics that deals with the behavior and application of semiconductors, diodes, transistors, and logic gates. Questions from this chapter are usually straightforward, formula-based, and require conceptual clarity. Regular practice of NEET Physics MCQs for Electronic Devices will help you master this chapter, improve problem-solving speed, and secure easy marks in the exam. Before solving MCQs, focus on understanding these key concepts from NCERT:

Semiconductors: Intrinsic and extrinsic semiconductors, doping, carrier concentration, conductivity.
PN Junction Diode: Characteristics, forward and reverse bias, breakdown voltage.
Zener Diode: Working and application as a voltage regulator.
Diode Applications: Rectifiers (half-wave, full-wave), efficiency, ripple factor.
Transistors: Configuration (CE, CB, CC), current gain, transistor as an amplifier and switch.
Logic Gates: AND, OR, NOT, NAND, NOR gates and truth tables.
Solar Cell, LED, Photodiode: Working principles and applications.

Importance of Solving NEET Physics MCQs for Electronic Devices

The Electronic Devices chapter is an important part of the NEET Physics syllabus, typically accounting for 2-3 questions, which translates to a potential of 8-12 marks. The questions are often conceptual and numerical, requiring a strong grasp of the fundamentals. Practicing MCQs from this chapter helps in:

Concept Reinforcement: Strengthens your understanding of semiconductor physics and electronic components.
Quick Problem-Solving: Improves calculation speed for diode currents, transistor currents, and rectifier efficiencies.
Error Reduction: Helps avoid common mistakes in circuit analysis and logic gate simplifications.
Exam-Readiness: Most NEET questions are based on standard NCERT concepts – practice ensures familiarity with them.

NEET Physics MCQs on Electronic Devices Chapter

The aspirants who are looking forward to appear for the NEET Exam must start preparing for the exam by solving more and more Electronic Devices MCQs as listed below:

Question 1: In an intrinsic semiconductor, the number of electrons is:

a) Greater than holes
b) Less than holes
c) Equal to holes
d) Zero

Answer: c) Equal to holes

Question 2: When a PN junction is forward biased, the depletion layer:

a) Widens
b) Disappears completely
c) Narrows
d) Remains unchanged

Answer: c) Narrows

Question 3: In a forward-biased diode, current is mainly due to:

a) Majority carriers
b) Minority carriers
c) Drift current
d) Displacement current

Answer: a) Majority carriers

Question 4: The current gain (β) of a transistor in CE configuration is 100. If base current is 40 μA, collector current is:

a) 2 mA
b) 4 mA
c) 0.4 mA
d) 1 mA

Answer: a) 2 mA
Solution:

I_C = \beta I_B = 100 \times 40 μA = 4000 μA = 4 mA

$I_{C} = β I_{B} = 100 \times 40 μ A = 4000 μ A = 4 m A$

Question 5: In a transistor, the emitter current is 5 mA and collector current is 4.9 mA. Current gain α (alpha) is:

a) 0.49
b) 0.98
c) 1.02
d) 0.50

Answer: b) 0.98
Solution:

\alpha = \frac{I_C}{I_E} = \frac{4.9}{5} = 0.98

$α = I ^{E} I ^{C} = 5 4.9 = 0.98$

Question 6: In a half-wave rectifier, the maximum efficiency is:

a) 100%
b) 50%
c) 81.2%
d) 40.6%

Answer: d) 40.6%

Question 7: A Zener diode is used as:

a) Current amplifier
b) Voltage regulator
c) Oscillator
d) Rectifier

Answer: b) Voltage regulator

Question 8: The Fermi level in an n-type semiconductor:

a) Moves towards conduction band
b) Moves towards valence band
c) Remains constant
d) Moves to the mid-gap

Answer: a) Moves towards conduction band

Question 9: The current in a forward-biased PN junction diode is of the order of:

a) μA
b) mA
c) nA
d) A

Answer: b) mA

Question 10: The output of a NOT gate is 1 when the input is:

a) 1
b) 0
c) Both 1 and 0
d) None of these

Answer: b) 0

Question 11: The truth table given below represents which logic gate?

A	B	Y
0	0	1
0	1	1
1	0	1
1	1	0

a) NOR Gate
b) NAND Gate
c) AND Gate
d) XOR Gate

Answer: b) NAND Gate

Question 12: The device used for converting solar energy into electrical energy is:

a) LED
b) Photodiode
c) Solar cell
d) Zener diode

Answer: c) Solar cell

Question 13: When a PN junction is reverse biased, current is due to:

a) Majority carriers
b) Minority carriers
c) Both majority and minority carriers
d) Thermal agitation only

Answer: b) Minority carriers

Question 14: In a transistor, the relation between currents is:

I_E = I_C – I_B

$I_{E} = I_{C} - I_{B}$
b)

I_E = I_B – I_C

$I_{E} = I_{B} - I_{C}$
c)

I_E = I_C + I_B

$I_{E} = I_{C} + I_{B}$
d)

I_E = I_B

$I_{E} = I_{B}$

Answer: c)

$I_E = I_C + I_B$

$I_{E} = I_{C} + I_{B}$

Question 15: The ripple factor of a full-wave rectifier is:

a) 1.21
b) 0.482
c) 0.707
d) 0.242

Answer: b) 0.482

Year Wise NEET Physics MCQs for Electronic Devices Chapter

In the table listed below, we have added the year wise NEET Physics MCQs for Electronic Devices Chapter so that all the students can start preparing accordingly. Click on the links below:

Year Wise NEET Physics MCQs for Electronic Devices Chapter
Year	Links
2014	Click Here
2015	Click Here
2016	Click Here
2017	Click Here
2018	Click Here

NEET Physics Chapters	MCQ Link
Physics and Measurement	Click Here
Kinematics	Click Here
Laws of Motion	Click Here
Work, Energy, and Power	Click Here
Rotational Motion	Click Here
Gravitation	Click Here
Properties of Solids and Liquids	Click Here
Thermodynamics	Click Here
Kinetic Theory of Gases	Click Here
Oscillation and Waves	Click Here
Electrostatics	Click Here
Current Electricity	Click Here
Magnetic Effects of Current and Magnetism	Click Here
Electromagnetic Induction and Alternating Currents	Click Here