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

For production of beats the two sources must have

Question # 2

The waves produced in a microwave oven have wavelength.

Question # 3

Acceleration of the mass at any instant is given by

Question # 4

A heavily damped system has a fairly

Question # 5

Angular frequency 'w' is basically a characteristics of

Question # 6

The speed of sound in a medium depends on

Question # 7

In case of mechanical waves, we study the motion of

Question # 8

Laplace formula is derived from

Question # 9

Which waves are used in sonography?

Question # 10

At 'resonance' the transfer of energy from deriving source to the oscillator is

Question # 11

The expression of Hook's law is

Question # 12

When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be

Question # 13

Fidelity refers to

Question # 14

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 # 15

The frequency of free vibrations is known as

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 A heavily damped system has a fairly
A. sharp resonance curve
B. flat resonance curve
C. both of them
D. none of them
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 It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be
A. 60°
B. 90°
C. 120°
D. 180°
4 Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of
A. very small energy
B. very large energy
C. frictional forces
D. acceleration due to gravity
5 The time period of pendulums of different lengths would be
A. same
B. different
C. both of them
D. none of them
6 When a mass 'm' is pulled slowly, the spring stretches by an amount x0,then the average force would be
A. F= Kx0
B. F=1/2Kx0
C. F=2Kx0
D. F=4Kx0
7 In the resonance condition, the amplitude of the oscillator becomes
A. very large
B. very small
C. zero
D. any one of them
8 Which one of the following could be the frequency of ultraviolet radiation?
A. 1.0 x 106Hz
B. 1.0 x 109Hz
C. 1.0 x 1012Hz
D. 1.0 x 1015Hz
9 The velocity of sound is greatest in
A. Water
B. Air
C. Vacuum
D. Metal
10 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

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