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 weight 'mg' of the bob is resolved into

Question # 2

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

Question # 3

Fidelity refers to

Question # 4

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

Question # 5

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

Question # 6

When a body moves to and fro motion, this type of motion is called

Question # 7

While describing the motion of a simple pendulum, the frictional effects are

Question # 8

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

Question # 9

When two progressive waves of nearly same frequencies superimpose and give rise to beats, then

Question # 10

What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?

Question # 11

A swing has

Question # 12

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

Question # 13

If the length of a simple pendulum is 0.25 m its time period would be

Question # 14

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

Question # 15

The time required to complete on vibration is called

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 In a resonance situation the amplitude of the motion may become extra ordinarily large, if
A. the driving force is large
B. the driving force is zero
C. the driving force may be feeble
D. all of them
2 If the length of a simple pendulum is 0.25 m its time period would be
A. 1.0 s
B. 2.0 s
C. 3.0 s
D. 4.0 s
3 When a mass 'm' is pulled slowly through a distance 'xo' , the elastic potential energy of the spring would be
A. P.E=Kx2o
B. P.E= 1/2kxo
C. P.E=1/2Kx2o
D. P.E=Kx2o
4 The expression of Hook's law is
A. F=ma
B. F=kx
C. F= -kx
D. -kx=ma
5 SI unit of frequency is
A. second
B. hertz
C. revolution
D. vibrations/sec
6 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
7 When the bob of simple pendulum is at extreme position, its K.E. will be
A. maximum
B. minimum
C. zero
D. all of them
8 Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator
A. greater than the frequency of applied force
B. equal to the frequency of applied force
C. less than the frequency of applied force
D. all of them
9 Crests and troughs are formed in:
A. Longitudinal waves
B. Transverse waves
C. Both of these
D. None of these
10 As the bob of the pendulum moves to and fro which of the force is experienced by the bob
A. its weight
B. tension in the string
C. viscous drag force by air
D. all of them

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