Question

When we change feeble sound to loud sound we increase its

• A. Frequency
• B. Amplitude
• C. Velocity
• D. Wavelength

Answer 1

The correct option is B

Amplitude

The explanation for the correct option:

Amplitude:

1. The amplitude (height) of the sound wave defines how loud the sound is.
2. Hence amplitude and loudness are directly proportional. When we change feeble sound to loud sound we increase its amplitude.

The explanation for the incorrect options:

Frequency:

The term frequency in physics refers to the number of waves that pass through a fixed point in unit time.

Velocity:

Velocity is, in essence, a vector quantity. It is the rate at which distance changes. It is the rate of change.of displacement.

Wavelength:

The distance between identical points (adjacent crests) in adjacent cycles of a waveform signal propagated in space or along a wire is defined as the wavelength.

Hence, Option(B) is correct.