SOUND

WinmeenAugust 30, 2018

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Unit – V SOUND - PHYSICS

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Question 1

When we listen to music, the medium through which sound is propagated is ………….

A	Solid
B	Liquid
C	Gas

Question 2

The principle on which stethoscope works is ………………

A	Reflection
B	Multiple reflection

Question 3

In a transverse mechanical wave, the particles of the medium vibrate in a direction ………….. to the direction in which the wave travels.

A	Parallel
B	Perpendicular

Question 4

Wave velocity = Frequency x …………….

A	Amplitude
B	Time period
C	Wave length

Question 5

Time taken by a particle of the medium to complete one vibrate on is called ……………

A	Time period
B	Frequency
C	Wave length

Question 6

The sensation of sound persists in the brain for about ………… of a second.

A	1/100
B	1/1000
C	1/10

Question 7

Bats send out and receive ……………. Wave reflected by the prey and obstacles.

A	Supersonic
B	Infrasonic
C	Ultrasonic

Question 8

From the list of frequencies, find the ultrasonic frequency.

A	2000 Hz
B	20000 Hz
C	30000 Hz
D	10000 Hz

Question 9

Find the odd one out on the basis of audiable range.

A	Elephant
B	Bat
C	Dolphin
D	Rabbit

Question 10

Musical sound gives us …………..

A	Pleasure
B	Pain
C	Information
D	Tension

Question 11

We are able to …………….. with each other through sound.

A	Quarrel
B	Quarrel
C	Work
D	Communicate

Question 12

The maximum displacement of a particle from the mean position is called ………

A	Frequency
B	Amplitude
C	Wave length
D	Time period

Question 13

Distance moved by a wave during the time a particle completed one vibration is ………………

A	Wave length
B	Time period
C	Amplitude
D	Frequency

Question 14

Speed of light is ………..

A	340 m/s
B	3x108 m/s
C	320 m/s
D	5000 m/s

Question 15

Bats hunt their prey by sending and receiving ………… wave

A	Infrasonic
B	Echo
C	Sonic
D	Ultrasonic

Question 16

Ships use ……….. to find the depth of seas.

A	Radar
B	Sonar
C	Echo
D	Sound wave

Question 17

With decrease in water vapour content in air, velocity of sound …………..

A	Increases
B	Decreases
C	Is constant
D	None

Question 18

Doppler shift in frequency depends upon ………………

A	velocity of sound
B	Velocity of source
C	Velocity of listener
D	All of the above

Question 19

Which of the following statements is correct?

A	Both sound and light waves in air are longitudinal
B	Both sound and light waves in air are transverse
C	Sound waves in air are transverse and light waves are electromagnetic transverse
D	Sound waves in air are longitudinal and light waves are electromagnetic transverse.

Question 20

Which of the following waves are not mechanical?

A	Torsional waves
B	Microwaves
C	Seismic waves
D	Ripples

Question 21

…………….. waves propagate in a medium to form compressions and rarefactions

A	Transverse
B	Longitudinal
C	Stationary
D	None

Question 22

In transverse wave the downward and maximum displacement is called ……………

A	trough
B	crest
C	compression
D	rarefaction

Question 23

Speed of sound in air is …………….

A	330 m/s
B	360 m/s
C	340 m/s
D	320 m/s

Question 24

The repeated reflection that results in the persistence of sound is …………….

A	Echo
B	Absorption
C	reverberation
D	none

Question 25

Time taken by a particle of the medium to complete one vibration is called ………….

A	time period
B	frequency

Question 26

The number of vibrations completed by a particle in one second is called ………….

A	time period
B	frequency

Question 27

The principle on which stethoscope works is ……………..

A	reflection
B	multiple reflection

Question 28

Sound waves require a ……………….. to travel.

A	Medium
B	Phase

Question 29

……………… is the area with maximum pressure.

A	compression
B	rarefaction

Question 30

……………….. is used to determine the velocities and movements of submarines and aircrafts.

A	Radar
B	Sonar

Question 31

Assertion (A) : Sound waves travel faster on a raindy day than on a dry day.
Reason (R) : Moisture increases the pressure.

A	A is wrong R is right
B	R explains A
C	R does not explain A
D	A is right R is wrong

Question 32

Match the following:

Ripple son surface of water - a) Longitudinal wave
Light waves - b) Mechanical transverse
Sound waves - c) Electro magnetic

A	3 1 2
B	1 3 2
C	2 1 3
D	3 2 1

Question 33

Match the following:

Light waves - a) Transverse mechanical
Sound waves b) Electromagnetic
Water waves - c) Longitudinal mechanical

A	1 3 2
B	3 1 2
C	2 1 3
D	3 2 1

Question 34

Match the following:

Amplitude - a) Time taken by a particle to complete one vibration.
Period of vibration - b) Distance moved by a wave in one vibration.
Frequency - c) Maximum displacement of a particle.
Wave length - d) the number of vibrations in one second.

A	4 1 3 2
B	3 1 2 4
C	2 4 1 3
D	3 2 1 4

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Unit – V SOUND - PHYSICS

Winmeen

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