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

MEDIUM

9th ICSE

IMPORTANT

Earn 100

A particular source produces $20$ crests and $20$ troughs in $0.4 s$ . What will be the frequency of this wave?

Important Questions on Sound

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}

.

MEDIUM

9th ICSE

IMPORTANT

All In One ICSE Physics>Chapter 9 - Sound>CHAPTER EXERCISE>Q 17

Establish the relationship between speed of sound, its wavelength and frequency. If the velocity of sound in air is

{340 ms}^{-1}

. Calculate the wavelength when the frequency is

256 Hz

.

EASY

9th ICSE

IMPORTANT

All In One ICSE Physics>Chapter 9 - Sound>CHAPTER EXERCISE>Q 17

Establish the relationship between speed of sound, its wavelength and frequency. If the velocity of sound in air is $340 {ms}^{- 1}$ . Calculate, the frequency when the wavelength is $0.85 m$ .

HARD

9th ICSE

IMPORTANT

All In One ICSE Physics>Chapter 9 - Sound>CHALLENGERS>Q 1

What is the distance travelled by sound in the air when a tuning fork of frequency

256 Hz

, when it completes

25

vibrations? (Take the speed of sound in air is

343 {ms}^{- 1}

)

HARD

9th ICSE

IMPORTANT

All In One ICSE Physics>Chapter 9 - Sound>CHALLENGERS>Q 2

Ultrasonic sound of frequency

100 kHz

emitted by a bat is incident on a water surface, the wavelength of reflected sound and transmitted sound are, respectively. (Take, speed of sound in air as

340 {ms}^{- 1}

and the speed of sound in water as

1486 {ms}^{- 1}

)

MEDIUM

9th ICSE

IMPORTANT

All In One ICSE Physics>Chapter 9 - Sound>CHALLENGERS>Q 3

The ratio of the speed of sound in hydrogen to the speed of sound in oxygen at

1270 K

is.