Question

Assertion Static crashes are heard on radio, when lightning flash occurs in the sky.
Reason Electromagnetic waves having frequency of radio wave range, interfere with radio waves.

• A. If both the assertion and reason are true and reason explains the assertion.
• B. If both the assertion and reason are true but reason does not explain the assertion.
• C. If assertion is true but reason is false.
• D. If assertion is false but reason is true.

Answer 1

Answer: (A)

We know that lightening flash produces electromagnetic waves. Flash counts of hapahazard electricals fields and current oscillate between group of clouds. Here, many changes oscillate and produce electromagnetic waves. Hence, the electromagnetic waves which have frequencies of radio wave range interfere with radio waves which produces static crashes.