Physics · JEE

I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator Concepts for JEE

8+ syllabus-aligned questions available

Quick answer

Master I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator by understanding definitions, standard results, and typical JEE question patterns — then practise with syllabus-aligned MCQs on Goodmarks.

Build clear conceptual foundations for I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator before speed practice. This guide covers what JEE expects and how to test yourself with MCQs.

Concept explainer

I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator is a core JEE Main Physics subtopic under Electronic Devices. Master the definitions, standard results, and typical MCQ patterns tested in JEE Main and Advanced.

Key points

Understand the definition and scope of I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator in the JEE syllabus
Memorise key formulas and standard results linked to I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator
Practise 20–40 syllabus-aligned MCQs with step-by-step solutions

JEE tips

Revise I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator with a one-page formula sheet before attempting mixed tests
After each practice set, log mistakes specific to I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator and reattempt after 48 hours

Common trap

Students often rush I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator questions without checking units, sign conventions, or boundary conditions — always verify assumptions before calculating.

Syllabus context

Part of Electronic Devices in JEE Main Physics.

Free sample questions

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Q1PhysicsUnit 19: Electronic Devices

The colour of light emitted by an LED depends on

Q2PhysicsUnit 19: Electronic Devices

Figure shown a DC voltage regulator circuit, with a Zener diode of breakdown voltage

=6 V .

If the unregulated input voltage varies between

10 V

16 V

then what is the maximum Zener current?

Q3PhysicsUnit 19: Electronic Devices

The operation of a solar cell requires:

Q4PhysicsUnit 19: Electronic Devices

Photodiode is a device

Q5PhysicsUnit 19: Electronic Devices

Assertion Photodiode and solar cell work on same mechanism. Reason Area is large for solar cell.

Q6PhysicsUnit 19: Electronic Devices

The attached figure shows the characteristics of:

Q7PhysicsUnit 19: Electronic Devices

A 5 V zener diode is used to regulate the voltage across load resistor

\boldsymbol{R}_{L}

and the input voltage varies in between

10 \mathrm{V}

15 \mathrm{V} .

The load current also varies from 5

\mathrm{mA}

50 \mathrm{mA}

. Find the value of series resistance R. Given,

\boldsymbol{I}_{Z}(\boldsymbol{m} \boldsymbol{i} \boldsymbol{n})=\boldsymbol{2} \boldsymbol{0} \boldsymbol{m} \boldsymbol{A}

Q8PhysicsUnit 19: Electronic Devices

The typical operating current for a lightemitting diode is approximately:

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Frequently asked questions

What concepts in I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator are essential for JEE?

Focus on core ideas across I-V characteristics of LED, the photodiode, solar cell, Zener diode, Zener diode as a voltage regulator. JEE tests application, not just memorisation.