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ICSE Class 8 Physics Question 1 of 21

Static Electricity — Question 3

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Question

Question 2(c)

Assertion (A) : Lightning is a natural example of static electricity.

Reason (R) : Lightning occurs due to the accumulation of same charges in clouds and earth's surface.

  1. Both A and R are true and R is the correct explanation of A
  2. Both A and R are true and R is not the correct explanation of A
  3. Assertion is true but reason is false
  4. Assertion is false but reason is true
Answer

Assertion is true but reason is false

Explanation

Lightning indeed represents a large-scale electrostatic discharge, so the Assertion is correct.
However, it is produced by the build-up of opposite charges—typically negative charges in the lower part of a cloud and positive charges on Earth’s surface or in another cloud—not by the build-up of like charges. Therefore the Reason is incorrect.