The principle of a lightning conductor is MCQ with Answer and Explanation

Question Report Error

The principle of a lightning conductor is

A. Electromagnetic induction

B. Mutual induction

C. Corona discharge

D. Photoelectric effect

Answer: Option C

Solution (By JKExamLibrary)

Lightning rod uses sharp point to facilitate corona discharge, neutralizing charge to prevent lightning strike.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

A radioactive nucleus emits a beta particle. Its mass number

A. Increases by 1

B. Decreases by 1

C. Decreases by 2

D. Remains unchanged

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Correct Answer: Option D

Explanation:
β⁻ decay: n → p + e⁻, so A unchanged, Z increases by 1.

This question belongs to: Science Physics

Question #2 Report Error

Electromagnetic induction basis for:

A. Transformer

B. Both (b) and (c)

C. Generator

D. Motor

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Correct Answer: Option B

Explanation:
Induction (changing flux ⇒ EMF): generators (motion ⇒ electricity), transformers (AC voltage conversion). Motors use reverse principle (force on current in field). Memory aid: 'Induction: generators, transformers; motors: Lorentz force'. Device principle frequently tested in competitive electromagnetism sections.

This question belongs to: Science Physics

Question #3 Report Error

A bimetallic strip is used in

A. Hydrometer

B. Barometer

C. Thermometer

D. Thermostat

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Correct Answer: Option D

Explanation:
Thermostat uses differential expansion to make/break circuit.

This question belongs to: Science Physics

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