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

An object undergoes S.H.M has maximum speed when its displacement from the mean position is

Question # 2

When a body is performing S.H.M., its acceleration is

Question # 3

The principle of superposition states that

Question # 4

When a mass 'm' is pulled slowly, the spring stretches by an amount xo, then the work done will be

Question # 5

Which of the following is/are example/s if mechanical waves i.e. waves generated in _______:

Question # 6

In compressional wave,the layer of medium having reduced pressure is called:

Question # 7

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

Question # 8

A body is executing free vibrations when it oscilates

Question # 9

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

Question # 10

Angular frequency 'w' is basically a characteristics of

Question # 11

There is no net transfer of energy by particle of medium in

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

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

Question # 14

Fidelity refers to

Question # 15

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

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Si units of time period is
A. second
B. hertz
C. revolution
D. vibration/sec
2 Acceleration of the mass at any instant is given by
A. a=k/m x
B. a= - m/k x
C. a = - k/m x
D. a=m/k x
3 If a simple pendulum is shifted from karachi to K-2 cliff, its time period
A. remains the same
B. decreases
C. increases
D. none of them
4 The waves which propagate out in space due to oscillation of electric and magnetic fields are known as
A. e.m. waves
B. mechanical waves
C. sound waves
D. water waves
5 Crests and troughs are formed in:
A. Longitudinal waves
B. Transverse waves
C. Both of these
D. None of these
6 In the formula for finding the speed of waves in the spring, unit of m in SIn units is:
A. kg
B. kg-meter
C. kg/meter
D. Meter/kg
7 The portion of the water above its mean level forms a:
A. Crest
B. Trough
C. Both A and B
D. None of these
8 If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are:
A. Stationary waves
B. Transverse waves
C. Both of these
D. None of these
9 When two waves with same frequency and constant phase difference phase difference interfere
A. There is a gain of energy
B. There is a loss of energy
C. The energy is redistributed and the distribution changes with time
D. The energy is redistributed and the distribution remains constant with time
10 If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be
A. Increasing by a factor of 2
B. Decreasing by a factor of 2
C. Decreasing by a factor of 4
D. Unchanged

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