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

Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at

Question # 2

In case of mechanical waves, we study the motion of

Question # 3

In the production of beats by 2 waves of same amplitude and nearly same frequency, the maximum intensity to each of the constituent waves is

Question # 4

If the displacement of a body executing S.H.M is plotted against time, then the curve is known as

Question # 5

Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator

Question # 6

Waves transport energy

Question # 7

The maximum displacement of a body on either side of its equilibrium position is called

Question # 8

Decibel is unit of

Question # 9

Through which character we can distinguish the light waves from sound waves

Question # 10

When a mass 'm' is pulled slowly, the spring stretches by an amount x0,then the average force would be

Question # 11

Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as

Question # 12

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

Question # 13

If two waves of length 50 cm and 51 cm produced 12 beats per second, the velocity of sound is

Question # 14

The resonance will be sharp, if the amplitude decreases rapidly at a frequency

Question # 15

The principle of superposition states that

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 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
2 A swing has
A. one natural frequency
B. two natural frequencies
C. three natural frequencies
D. four natural frequencies
3 The velocity of sound in air not effected by changes in
A. Moisture contents in air
B. Temperature of air
C. The atmosphere pressure
D. The composition of air
4 Laplace formula is derived from
A. Isothermal change
B. Adiabatic change
C. Isobaric change
D. None of these
5 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
6 In compressional wave,the layer of medium having reduced pressure is called:
A. Compression
B. Elasticity
C. Node
D. Rarefaction
7 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
8 The expression for restoring force is
A. F=ma
B. F=kx
C. F= -kx
D. Kx=ma
9 It is possible to recognize a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice
A. Has a definite pitch
B. Has a definite quality
C. Has a definite capacity
D. Can penetrate the wall
10 The weight 'mg' of the bob is resolved into
A. one component
B. two components
C. three components
D. four components

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