Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 13

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What is the phase difference between the displacement wave and pressure wave in sound wave?

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Important Questions on Waves

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 14

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

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 15

The intensity of sound reduces by

20 %

on passing through a glass slab. If sound of intensity

I

is made to cross through two such slabs, then the intensity of emergent sound will be

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 16

Two periodic waves of intensities

I_{1}

and

I_{2}

pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is :

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 17

If the intensity of sound is increased by a factor of $30$ , by how many decibels is the sound level increased?

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 18

A stationary wave is represented by

y = A \sin (100 t) \cos (0.01 x)

, where

y

and

A

are in millimetres,

t

is in second and

x

is in metre. The velocity of the constituent wave is

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 19

The length of a sonometer wire

A B

is

110 cm

. Where, should the two bridges be placed from

A

to divide the wire in

3

segments whose fundamental frequencies are in the ratio of

1 : 2 : 3

?

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 20

Standing waves are produced in

10 m

long stretched string. If the string vibrates in

5

segments and the wave velocity is

20 {ms}^{- 1}

, then its frequency will be

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Gamma Question Bank for Medical Physics>Chapter 15 - Waves>Assignment>Q 21

If the tension and diameter of a sonometer wire of fundamental frequency n are doubled and density is halved, then its fundamental frequency will become