MCQ PRACTICE – 2

When a tuning fork produces sound waves in air, which one of the following is the same in the material of tuning fork as well as in air ?

A person standing between a pair of tall and wide cliffs claps his hands. He hears the first two echoes at 2 sec and 3 sec respectively. If the speed of sound is 330 m/sec, then

Which one of the following material will reflect sound better?

An underwater sonar source operating at a frequency of 

The minimum distance between the source of the sound and the obstacle for an echo (at 20ºC) to take place is :

Three different vibrating bodies produce three types of sounds X, Y, and Z.

The loudness of sound decreases with an:

Identify the longitudinal waves from the following

A person is in front of a vertical mountain fires a bullet and hears its echo after a time 3 s. The person walks a distance 'd' towards mountain then fires another bullet and hears its echo after a time 2 s. If velocity of sound in air is 340 ms-1 , the value of 'd' is

An echo is heard because of the persistence of _____________

Which of the following is/are correct statement(s)?

When a tuning fork is striked using a rubber prong, the compressions and rarefactions in the sound wave correspond to

The time period of the second hand in a clock is :

A man pronounces a, b, c, d and e and hears last four syllables as an echo. Taking velocity of sound as 340 ms-1 , the distance of reflecting surface, if it takes one-fifth of a second to pronounce or hear one syllable is

The time period of a vibrating body is 0.02s. The frequency of the vibrating body will be