MCQ PRACTICE – 1

If the velocity of sound in a gas is 360 m/s and the distance between compression and the nearest rarefraction is 1m, then the frequency of sound is

The wavelength of sound from a tuning fork of frequency 330 Hz is nearly. Use speed of sound in air as 330 m/s

Which of the following is not a property of ultrasound that makes it useful in medicine?

Which of these is not a function of the ear drum?

Which of the following correctly describes a wave?

Objects that have hard-to-reach places for cleaning are placed in _________ and ultrasound waves are sent there.

A sound signal is simultaneously sent in air and water from a boat on a river. The echo of sound sent back by the river bed is heard in 4s, while the echo sent back by the aeroplane is heard in 8s. Find the distance between aeroplane and river bed.

An echo is heard, if ____________ between the source and the reflector is atleast 17 m

It is possible to recognise a person by hearing his voice even if he is hidden behind a wall. This is due to the fact that his voice

A long spring whose one end is fixed is stretched from the other end and then left longitudinal waves of frequency 500 Hz are produced. If the velocity of the wave is 250 m/s. Find the distance between two consecutive compressions and rarefaction.

A stone is dropped in a well which is 19.6m deep. Echo sound is heard after 2.06 sec (after dropping) then the velocity of sound is

A person can hear a sound of maximum frequency 20,000Hz, If the speed of sound in air is 344 ms −1  the wavelength is :

Some whistles are designed to produce waves that can attract the attention of dogs but humans do not notice these waves. What kind of waves are these?

Which of these correctly represents the definition of frequency?

Sound waves are also called?

An echo is returned in 3 s. If the speed of sound is 342 m/s, then the distance between the source of sound and the reflecting body is:

A metallic spoon falls on a metal plate making a huge sound and upon bouncing from the plate, it falls on to the pile of sand below it with no noise being heard. Sound is not heard on sand because

The nature of sound waves in gases is

Statement 1: Loudness is the characteristic of a musical sound by which a loud sound can be distinguished from a faint sound.

Two identical sounds A and B reach a point in the same phase. The resultant sound is C. The loudness of C is n dB higher than the loudness of A. The value of n is?