Embibe Experts Solutions for Chapter: Sound Waves, Exercise 2: Exercise - 2

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Embibe Experts Physics Solutions for Exercise - Embibe Experts Solutions for Chapter: Sound Waves, Exercise 2: Exercise - 2

Attempt the free practice questions on Chapter 21: Sound Waves, Exercise 2: Exercise - 2 with hints and solutions to strengthen your understanding. Alpha Question Bank for Engineering: Physics solutions are prepared by Experienced Embibe Experts.

Questions from Embibe Experts Solutions for Chapter: Sound Waves, Exercise 2: Exercise - 2 with Hints & Solutions

MEDIUM
JEE Main/Advance
IMPORTANT

The ratio of speeds of sound in nitrogen gas to that in helium gas at 300 K is

EASY
JEE Main/Advance
IMPORTANT

A closed pipe and an open pipe have their first overtones identical in frequency. Their lengths are in the ratio

HARD
JEE Main/Advance
IMPORTANT

A source of sonic oscillations with frequency f0=1700 Hz and a receiver are located on the same normal to a wall. Both the source and the receiver are stationary, and the wall recedes from the source with velocity u=6.0 cm s-1. Find the beat frequency registered by the receiver. The velocity of sound is equal to v=340 m s-1.

HARD
JEE Main/Advance
IMPORTANT

Two narrow organ pipes, one open (length l1) and the other closed (length l2) are sounded in their respective fundamental modes. The beat frequency heard is 5 Hz. If now the pipes are sounded in their first overtones, then also the beat frequency heard is 5 Hz. Then:

EASY
JEE Main/Advance
IMPORTANT

Select all the correct alternatives. Two identical straight wires are stretched so as to produce 6 beats per second when vibrating simultaneously. On changing the tension slightly in one of them, the beat-frequency remains unchanged. Denoting by T1, T2 the higher and the lower initial tensions in the strings, then it could be said that while making the above changes in tension.

EASY
JEE Main/Advance
IMPORTANT

A girl stops singing a pure note. She is surprised to hear an echo of higher frequency, i.e., a higher musical pitch. Then:

HARD
JEE Main/Advance
IMPORTANT

In the figure shown an observer O1 floats (static) on the water surface with ears in air while another observer O2 is moving upwards with constant velocity V1=V5 in water. The source moves down with constant velocity Vs=V5 and emits the sound of frequency f. The velocity of sound in air is V and that in water is 4V. For the situation shown in figure: 

Question Image

EASY
JEE Main/Advance
IMPORTANT

Two sound waves move in the same direction in the same medium. The pressure amplitude of the waves are equal but the wavelength of the first wave is double that of the second. Let the average power transmitted across a cross section by the two wave be P1 and P2 and their displacement amplitudes be s1 and s2, then