PPSC Lecturer of Physics Online Test 40 Past Papers

A sonometer or audiometer is a device based on the principle of:

The perceived fundamental frequency of a sound is called:

A ................. is an interference between two sounds of slightly different frequencies:

For polarization, the direction of oscillation has to be perpendicular to the direction of travel. Sound waves are longitudinal waves so they cannot be:

Which field of science deals with the study of all mechanical waves including vibrations sound?

Wave motion in air consist of:

Sonography is an ultra-sound based imaging technique used for diagnosis. It uses sound waves of:

An ................ is any frequency higher than the fundamental frequency of a sound:

Which physical property is most responsible for resonance?

Which of the following devices is used for playing sound recordings? (The other name of gramophone):

The amplitude of a vibrating body at resonance placed is vacuum is:

During WWI, which device was used by submarines to detect targets while submerged?

The fixed ends of a vibrating string are:

The phase velocity is the velocity of point that moves with a wave at constant phase. It is also called:

Which technique uses underwater sound propagation to detect and locate submerged objects?

Beats occur due to:

How many antinodes must be there between two nodes?

Hearing damage is possible at sound pressure of:

The human ear is sensitive to waves in the frequency range also called the audible range from about 20 Hz to:

Transverse waves only propagate in:

The speed of sound is air at 20°C is:

A sonometer is also called “monochord” because it often has:

The loudness of a sound depends on its:

In an oscillating system, damping is reduction in:

The addition of two or more waves is termed: