All In One ICSE Physics>Chapter 9 - Sound>CHAPTER EXERCISE>Q 7

HARD

9th ICSE

IMPORTANT

Earn 100

Give three differences between ultrasonic and supersonic sound waves.

Important Questions on Sound

HARD

9th ICSE

IMPORTANT

All In One ICSE Physics>Chapter 9 - Sound>CHAPTER EXERCISE>Q 9

What principle is used by traveler man to locate shoals of fish?

MEDIUM

9th ICSE

IMPORTANT

All In One ICSE Physics>Chapter 9 - Sound>CHAPTER EXERCISE>Q 10

Explain experimentally to show that in wave motion the energy is transferred, but the particles of medium do not move.

MEDIUM

9th ICSE

IMPORTANT

All In One ICSE Physics>Chapter 9 - Sound>CHAPTER EXERCISE>Q 11

Explain four difference between longitudinal and transverse wave.

EASY

9th ICSE

IMPORTANT

All In One ICSE Physics>Chapter 9 - Sound>CHAPTER EXERCISE>Q 12

A wave travelling with a speed of

240 \frac{m}{s}

and its wavelength is

3.2 m

. Find the value of the period of the wave.

MEDIUM

9th ICSE

IMPORTANT

All In One ICSE Physics>Chapter 9 - Sound>CHAPTER EXERCISE>Q 13

A particular source produces

20

crests and

20

troughs in

0.4 s

. What will be the frequency of this wave?

MEDIUM

9th ICSE

IMPORTANT

All In One ICSE Physics>Chapter 9 - Sound>CHAPTER EXERCISE>Q 14

A radio transmission produces a frequency of

300 kHz

. Find its wavelength. The speed of light in air,

c = 3.0 \times 10^{8} m / s .

HARD

9th ICSE

IMPORTANT

All In One ICSE Physics>Chapter 9 - Sound>CHAPTER EXERCISE>Q 15

A sound wave travels at a speed of

{330 m s}^{-1}

. If its wavelength is

1.5 cm

. Calculate the frequency of the sound wave.

HARD

9th ICSE

IMPORTANT

All In One ICSE Physics>Chapter 9 - Sound>CHAPTER EXERCISE>Q 16

Determine the wavelength of an ultrasonic wave of frequency

4.2 MHz

. The speed of the ultrasonic wave is

1.7 {kms}^{- 1}

.