Question

In the following questions, a statement of assertion followed by the reason is given. Choose the correct answers out of the following choices:

Assertion: Sound produced by different sources travel at a different speed in air.

Reason: The velocity of sound is given by$v=f\lambda$.

• A. Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
• B. The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
• C. Assertion is true but the Reason is false.
• D. The statement of the Assertion is false but the Reason is true.
• E. Both the statements are false.

Answer 1

The correct option is D

The statement of the Assertion is false but the Reason is true.

1. A sound wave is a form of energy that flows from one point to another.
2. This flow of energy is in the form of waves.
3. Velocity of the sound depends upon the wavelength and the medium where it flows.
4. For different sources of wave, wave velocity remains the same in the same medium.
5. Thus, the assertion is false.
6. Wave velocity is defined as the product of frequency and wavelength.
7. Velocity of sound is given by$v=f\lambda$, where $f$ is the frequency and $\lambda$ is the wavelength.
8. Thus, the assertion is false and the reason is true.
9. Thus, option D is correct.