Physics MCQ

Assertion (A): Frequency is a measurable quantity. It depends on the source producing sound.
Reason (A): Pitch depends on the sensation as perceived by a listener.

Assertion (A): Strings of different thicknesses are provided on a stringed instrument.
Reason (A): Notes of different frequences can be obtained by producing vibrations in different strings having different thicknesses.

In natural vibrations, the vibrations are only under the:

Resonance is a special case of:

If the frequency of the external force is much different from the natural frequency of the body, the amplitude of oscillations is:

The periodic vibrations of continuously decreasing amplitude in the presence of resistive force are called:

The vibrations of a constant amplitude can occur only in:

The natural vibrations are the simple harmonic vibrations under the restoring force in which:

The sound produced by two tuning forks A and B have same amplitude and same waveform, but the frequency of A is three times more than B. In such a case:

The voice of women is shrill as compared to men because of the difference in their:

Two notes are produced from a flute and piano, such that they have same loudness and same pitch. The notes so produced differ in their:

The amplitude of forced vibrations is generally ___________ than the amplitude of applied external force.

The physical quantity that will remain unchanged after reflection of sound wave is:

A person stands between two parallel cliffs which are 99 m apart. The person fires a gun and hears two successive echoes after 0.2 s and 0.4 s . Then the distance of the person from nearer cliff is

A boy shouts in front of a high hill and hears his own voice after some time. The phenomenon taking place is known as:

Speed of sound in solids and liquids is:

The ultasonic waves are more energetic than the

The longitudinal waves can travel in:

The wave produced in the interior of the earth is called:

When sound gets reflected from a surface:

To locate its prey in the darkness the owl or the bat emits

The practical application based on the reflection of sound is: