Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
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 assertion and reason are true and reason is the correct explanation of assertion
B) If both assertion and reason are true but reason is not the correct explanation of assertion
C) If assertion is true but reason is false
D) If both assertion and reason are false
Correct Answer: A
Solution :
We know that lightening flash produes electromagnetic waves. Flash counts of hapahazard electricals fields and current oscillate between group of clouds. Here, many changes oscillate and produce electromagmnetic waves. Hence, the electromagnetic waves which have frequencies of radio wave range interfere with radio waves which produces static crashes. Hence, option (a) is correct.
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