ECAT Pre Computer Science Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 8 Waves

Try The 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 time period of pendulums of different lengths would be

Question # 2

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

Question # 3

The distance covered by the wave in one second is:

Question # 4

Of the following, the option ______ reminds of longitudinal waves.

Question # 5

The expression for restoring force is

Question # 6

Ultra-violet rays differ from X-rays in that they

Question # 7

In stationary waves

Question # 8

When an oscillatory motion repeats itself, then this type of motion is called

Question # 9

The weight 'mg' of the bob is resolved into

Question # 10

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

Question # 11

The bob of a simple pendulum is suspended by

Question # 12

In solids, only following type/s of wave can travel:

Question # 13

If a wave can be polarized, it must be

Question # 14

One complete round trip of the body about its mean position is called

Question # 15

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

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 In compressional wave,the layer of medium having reduced pressure is called:
A. Compression
B. Elasticity
C. Node
D. Rarefaction
2 The vibrations of factory floor caused by the running of heavy machinery is an example of
A. free vibration
B. natural vibrations
C. forced vibrations
D. all of them
3 The resonance will be sharp, if the amplitude decreases rapidly at a frequency
A. equal to the resonant frequency
B. slight different from the resonant frequency
C. greatly different from the resonant frequency
D. any one of them
4 With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are
A. Energy, momentum and mass
B. Energy
C. Energy and mass
D. Energy and linear momentum
5 The vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called
A. rotatory motion
B. motion under gravity
C. angular motion
D. simple harmonic motion
6 Si units of time period is
A. second
B. hertz
C. revolution
D. vibration/sec
7 When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be
A. 45°
B. 90°
C. 135°
D. 180°
8 If the length of second pendulum becomes four times then its time period will become
A. Four time
B. Two times
C. Six times
D. Eight times
9 The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be
A. 1 : 2
B. 4 : 1
C. 1 : 4
D. 2 : 1
10 A wave, which transfer energy by moving away from the source of disturbance is called a
A. progressive wave
B. travelling wave
C. both of them
D. none of them

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