Sunil Batra Solutions for Chapter: Sound, Exercise 8: CHAPTER PRACTICE TEST 1

Temperature has no effect on speed of sound in air.

Frequency of infrasonic waves $>$ Frequency of ultrasonic waves.

Due to the high power of ultrasound waves, it is used for breaking and cutting objects.

$\mathrm{Frequency}\times \mathrm{Time} \mathrm{period}=$ _____.

Sound is produced by a _____ body.

(vibrating/reflecting)

Sound waves cannot travel through _____.
(metal / vacuum)

The frequency of a source of sound is $20 \mathrm{Hz}$. Its time period _____ second.

The multiple reflections of sound in a hall is called _____.