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

transverse wave motion is possible in:

Question # 2

If the time period a simple pendulum is 2 s, its frequency would be

Question # 3

The waves produced in a microwave oven have frequency

Question # 4

SI unit of frequency is

Question # 5

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

Question # 6

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:

Question # 7

The vibratory or oscillatory motion of a body is

Question # 8

The distance covered by the wave in one second is:

Question # 9

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

Question # 10

Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?

Question # 11

Which one is not produced by sound waves in air?

Question # 12

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

Question # 13

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

Question # 14

Decibel is unit of

Question # 15

The temperature at which the speed of sound becomes double as was at 27°C is

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Angular frequency 'w' is basically a characteristics of
A. linear motion
B. circular motion
C. both of them
D. none of them
2 To hear a clear echo, the reflecting surface must be at a minimum distance of
A. 10 m
B. 16.5 m
C. 33 m
D. 66 m
3 Through which character we can distinguish the light waves from sound waves
A. Interference
B. Refraction
C. Polarization
D. Reflection
4 When two progressive waves of nearly same frequencies superimpose and give rise to beats, then
A. Frequency of beat changes with time
B. Frequency of beat changes with location of observer
C. All particles of medium vibrate simple harmonically with frequency equal to the difference between frequencies of component waves
D. Amplitude of vibration of particles at any point changes simple harmonically with frequency equal to difference between two component waves
5 Which of the following does not exhibit S.H.M?
A. a plucked violin string
B. a mass attached to a spring
C. a train shunting between two terminals
D. a simple pendulum
6 The maximum displacement of a body on either side of its equilibrium position is called
A. frequency
B. amplitude
C. displacement
D. time period
7 Which one of the following elasticizes is possessed by fluids:
A. Young's elastic modulus (length)
B. Bulk elastic modulus (volume)
C. Modulus of rigidity (shape)
D. None of these
8 The force which opposes the applied force producing the displacement in the spring is called
A. restoring force
B. periodic force
C. centripetal force
D. resistive force
9 A swing has
A. one natural frequency
B. two natural frequencies
C. three natural frequencies
D. four natural frequencies
10 In compressional wave,the layer of medium having reduced pressure is called:
A. Compression
B. Elasticity
C. Node
D. Rarefaction

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