A&R - Sound waves — task. Physics CBSE Live product, Class 9 (2026-27).

Read the Assertion and Reason carefully and select the correct option:

1. Assertion (A): A microphone can convert sound into an electrical signal.

Reason (R): A microphone is used to increase the amplitude of a sound wave.

Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

2. Assertion (A): A sound wave with a higher frequency has a smaller time period.

Reason (R): Frequency and time period are related by \(\nu=\frac{1}{T}\)

Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

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3. A&R - Sound waves

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