Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 1

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At room temperature $(27 ° C),$ the velocity of sound in air is $330 m s^{- 1} .$ The increase in velocity of sound when temperature is increased by $1 ° C$ is

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Important Questions on Waves

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 2

Assuming the temperature to be constant, as we go up in the atmosphere, the velocity of sound

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 3

The wavelength of the note emitted by a tuning fork of frequency

100 Hz

is

3.32 m .

If the density of air at STP is

1.29 kg m^{- 3},

the

γ

for air is

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 4

The temperature at which the velocity of sound in air becomes double its velocity at

0 ° C

is

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 6

A thick uniform rope of length $L$ is hanging from a rigid support. A transverse wave of wavelength $λ_{0}$ is set up in the middle of the rope. The wavelength of the wave as it reaches the top most point is

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 8

A sinusoidal wave is given by

y = A \sin (k x - ω t) .

The ratio of its maximum particle velocity to wave velocity is

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 9

An isotropic point source

' S'

of sound emits constant power. Two points

A

and

B

are situated at distance

x

and

2 x

from

S .

The difference between the loudness of points

A

and

B

is about

(\log 2 \approx 0.3)

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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 10

Figure shows a snapshot for a travelling sine wave along a string. Four elemental portions

a, b, c

and

d

are indicated on the string. The elemental portion which has maximum potential energy is/are
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Gamma Question Bank for Engineering Physics>Chapter 14 - Waves>Assignment Set-2>Q 11

The ratio of intensities between two coherent sound sources is

4 : 1 .

The difference of loudness in

d B

between maximum and minimum intensities when they interfere in the space is