1.

Assertion (A) : A child produces a higher pitched sound compared to that of an adult Reason (R): Pitch depends on the frequency of sound.

Answer»

A and R are correct and R is the correct explanation of A
A and R are correct but R is not the correct explanation of A
A is correct but R is not correct
Both A and R are not correct

Solution :A CHILD produces a higher pitched sound COMPARED to that of an adult. Because pitch depends on the length and thickness of a vibrating body, i.e., VOCAL cord in this case. So, A is correct
The pitch depends on the FREQUENCY of sound. R is also correct but not the correct explanation is A


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