A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 19

MEDIUM

11th West Bengal Board

IMPORTANT

Earn 100

If temperature increases from $10 ° C$ to $20 ° C$ , what percentage change in velocity of sound in air will take place?

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Important Questions on Waves

EASY

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 20

At what temperature (in

° C

) will the velocity of sound in air be

1.5

times the velocity of sound at

10 ° C

?

MEDIUM

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 21

Calculate the velocity of sound in air at NTP. (Given

\frac{C_{P}}{C_{V}} = 1.4

. Density of air at NTP =

0.001293 g {cm}^{- 3}

. Density of mercury =

13.6 g {cm}^{- 3}

and

g = 981 cm s^{- 2}

.

EASY

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 22

If the velocity of sound at

0 ° C

and pressure

75 cm

be

330 m s^{- 1}

, what will be the velocity at

50 ° C

and pressure

70 cm

?

EASY

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 23

Find the velocity of sound in hydrogen gas at NTP. Density of hydrogen at NTP is

0.09 g l^{- 1}

,

γ = 1.4

and Pressure at NTP =

P = 1.013 \times 10^{5} N m^{- 2}

.

HARD

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 24

The velocity of sound through hydrogen is

1400 m s^{- 1}

. What will be the velocity of sound ( in

m s^{- 1}

) through a mixture of two parts by volume of hydrogen and one part of oxygen?

HARD

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 25

At normal temperature and pressure, the speed of sound in air is

332 m s^{- 1}

. What will be the speed of sound (in

m s^{- 1}

) in hydrogen at temperature

819 ° C

and

4

atmospheric pressure? Air is

16

times heavier than hydrogen.

MEDIUM

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 26

A tuning fork of frequency

500 Hz

when held over a closed pipe, gives resonance with air columns of lengths

0.15 m

and

0.49 m

. What is the velocity of sound in air ( in terms of

m s^{- 1}

) ?

MEDIUM

11th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 22 - Waves>EXERCISE>Q 27

A tuning fork of frequency

512 Hz

is held at the open mouth of a tube of diameter

10 cm

immersed in water. How far the tube need to be raised (in terms of

cm

) from water in order that resonance may occur ? Velocity of sound =

330 {ms}^{- 1}