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

Mechanical waves on the surface of a liquid are

Question # 2

Time period of a simple pendulum depends upon the

Question # 3

The bob of a simple pendulum is suspended by

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

The velocity of sound in air not effected by changes in

Question # 9

Si units of time period is

Question # 10

Example of progressive wave is

Question # 11

The example of mechanical wave 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

The force which opposes the applied force producing the displacement in the spring is called

Question # 14

The loudness and pitch of a sound note depends on

Question # 15

The number of vibrating body at any instant from its equilibrium position is called

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The characteristic of a body executing S.H.M is that its acceleration is
A. inversely proportional to displacement
B. directly proportional to displacement
C. independent of displacement
D. equal to zero
2 The frequency of free vibrations is known as
A. free frequency
B. forced frequency
C. natural frequency
D. un-natural frequency
3 In transverse waves, the individual particles of the medium move:
A. In circles
B. Perpendicular to the direction of level
C. Parallel to the direction of level
D. None of these
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 The example of mechanical wave is
A. waves in ropes
B. waves on water surface
C. waves in air
D. all of them
6 Waves transport energy
A. without transport energy
B. with matter
C. both of them
D. none of them
7 The expression of Hook's law is
A. F=ma
B. F=kx
C. F= -kx
D. -kx=ma
8 The waves produced in a microwave oven have frequency
A. 2450 Hz
B. 2450 K Hz
C. 2450 M Hz
D. 2450 G Hz
9 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
10 Which one is not produced by sound waves in air?
A. Polarization
B. Diffraction
C. Refraction
D. Reflection

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