ECAT Pre Computer Science Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 8 Waves

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ECAT Physics Chapter 8 Waves

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Question # 1

The damping depends upon the

Question # 2

When sound waves travel from air to water which of these remains constant?

Question # 3

The velocity of sound is greatest in

Question # 4

Longitudinal waves are also called:

Question # 5

The time required to complete on vibration is called

Question # 6

Example of progressive wave is

Question # 7

Example of vibratory motion is

Question # 8

When the bob of simple pendulum is at mean position, its K.E will be

Question # 9

The square of 0.4 is:

Question # 10

The weight 'mg' of the bob is resolved into

Question # 11

The loudness and pitch of a sound note depends on

Question # 12

Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of

Question # 13

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

Question # 14

The characteristic of a body executing S.H.M is that its acceleration is

Question # 15

SI unit of frequency is

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Sr.# Question Answer
1 SI unit of wave length is:
A. Kilometer
B. Metre
C. Centimetre
D. Hertz
2 Which waves are used in sonography?
A. Microwaves
B. Infra red waved
C. Sound waves
D. Ultrasonic waves
3 Example of vibratory motion is
A. mass suspended from a spring
B. a bob of simple pendulum
C. mass attached to a spring placed
D. all of them
4 The distance covered by the wave during one period is called its:
A. Wave number
B. Frequency
C. Wavelength
D. Time period
5 At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is
A. Sinusoidal shape with amplitude A/3
B. Sinusoidal shape with amplitude A/2
C. Sinusoidal shape with amplitude A
D. Straight line
6 The maximum displacement of a body on either side of its equilibrium position is called
A. frequency
B. amplitude
C. displacement
D. time period
7 The wave motion set up in any medium depends upon:
A. Elasticity
B. Inertia
C. Density
D. All of these
8 Fidelity refers to
A. Reproduction of original sound
B. Reproduction of original image
C. Reproduction of music
D. Reproduction of a CD from original copy
9 Two sound waves of slightly different frequencies propagating in the same direction produce beats due to
A. Interference
B. Diffraction
C. Polarization
D. Refraction
10 The example of mechanical wave is
A. waves in ropes
B. waves on water surface
C. waves in air
D. all of them
11 Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at
A. subsonic speed
B. sonic speed
C. super sonic speed
D. any one of them
12 Velocity of sound in vacuum (in m/s) is
A. 330
B. 1000
C. 156
D. 0
13 A weakly damped system has fairly
A. sharp resonance curve
B. flat resonance curve
C. both of them
D. none of them
14 A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:
A. Longitudinal wave
B. Transverse wave
C. No vibration at all
D. None of them
15 SI unit of frequency is
A. second
B. hertz
C. revolution
D. vibrations/sec

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