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

To hear a clear echo, the reflecting surface must be at a minimum distance of

Question # 2

The vibrations of factory floor caused by the running of heavy machinery is an example of

Question # 3

The instantaneous velocity of a body moving along a circle is directed

Question # 4

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

Question # 5

Which one of the following elasticizes is possessed by fluids:

Question # 6

The waves in which the particles of the medium have displacement along the direction of propagation of waves are called

Question # 7

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 # 8

If a freely oscillating system is subjected to an external force, then

Question # 9

Which of the following is an example of a S.H.M?

Question # 10

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

Question # 11

Energy is not carried by

Question # 12

Acceleration of the mass at any instant is given by

Question # 13

When a mass 'm' is pulled slowly through a distance 'xo' , the elastic potential energy of the spring would be

Question # 14

If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get

Question # 15

The restoring force always directed towards the

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The velocity of sound is greatest in
A. Water
B. Air
C. Vacuum
D. Metal
2 When a mass 'm' is pulled slowly, the spring stretches by an amount xo, then the work done will be
A. W=Kxo
B. W=1/2Kxo
C. W=1/2Kx2o
D. W=4Kxo
3 Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as
A. waves
B. beat
C. interference
D. resonance
4 The expression of Hook's law is
A. F=ma
B. F=kx
C. F= -kx
D. -kx=ma
5 SI unit of wave length is:
A. Kilometer
B. Metre
C. Centimetre
D. Hertz
6 The waves which propagate out in the space due to oscillations of electric and magnetic fields are called:
A. Mechanical waves
B. Electromagnetic waves
C. Matter waves
D. All of them
7 If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get
A. diffraction
B. beat
C. interference
D. resonance
8 Through which character we can distinguish the light waves from sound waves
A. Interference
B. Refraction
C. Polarization
D. Reflection
9 If a wave can be polarized, it must be
A. An electromagnetic wave
B. A longitudinal wave
C. A progressive wave
D. A transverse wave
10 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

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