Physics · JEE

Important Questions: Electronic Devices for JEE

9+ syllabus-aligned questions available

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The most important Electronic Devices questions for JEE cover conceptual traps, standard results, and numerical patterns from Semiconductors, semiconductor diode: I-V characteristics in forward and reverse bias, diode as a rectifier, I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator, Logic gates (OR, AND, NOT, NAND and NOR). Goodmarks provides 9+ high-yield MCQs with full solutions.

Focus on what matters most. These important Electronic Devices questions cover high-weightage concepts from Semiconductors, semiconductor diode: I-V characteristics in forward and reverse bias, diode as a rectifier, I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator, Logic gates (OR, AND, NOT, NAND and NOR) — the topics JEE repeats every year.

Subtopics in Electronic Devices

Semiconductors, semiconductor diode: I-V characteristics in forward and reverse bias, diode as a rectifier
I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator
Logic gates (OR, AND, NOT, NAND and NOR)

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Q1PhysicsUnit 19: Electronic Devices

The transistor are usually made of

Q2PhysicsUnit 19: Electronic Devices

When all the inputs of a NAND gate are connected together, the resulting circuit is:

Q3PhysicsUnit 19: Electronic Devices

The ratio (R) of output resistance

r_{0}

and and the input resistance

r_{i}

in measurements of input and output characteristics of a transistor is typically in the range:

Q4PhysicsUnit 19: Electronic Devices

Thermistor material is pressed

Q5PhysicsUnit 19: Electronic Devices

Which of the following applications is not based on use of ICs?

Q6PhysicsUnit 19: Electronic Devices

In a transistor, forward bias is always smaller than the reverse bias. This is done to :

Q7PhysicsUnit 19: Electronic Devices

What will be the input of

A

and

B

for Boolean expression

(\overline{A+B})(\overline{A \cdot B})=1

Q8PhysicsUnit 19: Electronic Devices

In common base circuit of a transistor, current amplification factor is 0.95 Calculate the emitter current if base current is

0.2 \mathrm{mA}

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Frequently asked questions

What makes a Electronic Devices question "important" for JEE?

Important questions test core concepts that appear frequently across JEE Main and Advanced papers — definitions, standard formulas, and classic problem types.

Which subtopics in Electronic Devices are high-weightage?

Key areas include Semiconductors, semiconductor diode: I-V characteristics in forward and reverse bias, diode as a rectifier, I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator, Logic gates (OR, AND, NOT, NAND and NOR). Prioritise these before moving to edge cases.

How many important questions should I revise?

Revise 30–50 important MCQs per unit in the last month before JEE. Focus on questions you got wrong at least once.

Can I practise only important questions on Goodmarks?

Pro users can filter by unit and subtopic to target high-yield areas. Free users can attempt sample questions on this page.