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 restoring force always directed towards the

Question # 2

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 # 3

Progressive waves of frequency 300 Hz are superimposed in produced a system of stationary waves in which adjacent nodes are 1.5 m apart. What is the speed of the progressive waves?

Question # 4

As the bob of the pendulum moves to and fro which of the force is experienced by the bob

Question # 5

The weight 'mg' of the bob is resolved into

Question # 6

Example of progressive wave is

Question # 7

Decibel is unit of

Question # 8

An object undergoes S.H.M has maximum acceleration when its displacement form the means position

Question # 9

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

Question # 10

The velocity of sound is greatest in

Question # 11

When a wave is travels from one place to another, it transfers:

Question # 12

If the mass of the simple pendulum becomes double, its time period

Question # 13

Which of the following does not exhibit S.H.M?

Question # 14

Which of the following is an example of a S.H.M?

Question # 15

The vibrations of factory floor caused by the running of heavy machinery is an example of

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The natural frequency of a pendulum which is vibrating freely, depends upon its
A. mass
B. length
C. material
D. all of them
2 Two sound waves of slightly different frequencies propagating in the same direction produce beats due to
A. Interference
B. Diffraction
C. Polarization
D. Refraction
3 Which one of the following could be the frequency of ultraviolet radiation?
A. 1.0 x 106Hz
B. 1.0 x 109Hz
C. 1.0 x 1012Hz
D. 1.0 x 1015Hz
4 When a body is performing S.H.M., its acceleration is
A. inversely proportional to the displacement
B. directly proportional to the applied force
C. directly proportional to the amplitude
D. directly proportional to the displacement but in opposite direction
5 The weight 'mg' of the bob is resolved into
A. one component
B. two components
C. three components
D. four components
6 Time period of a simple pendulum depends upon the
A. length of the pendulum
B. acceleration due to gravity
C. none of them
D. both of them
7 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
8 The restoring force always directed towards the
A. extreme position
B. mean position
C. both of them
D. none of them
9 The resonance will be sharp, if the amplitude decreases rapidly at a frequency
A. equal to the resonant frequency
B. slight different from the resonant frequency
C. greatly different from the resonant frequency
D. any one of them
10 A physical system under going forced vibrations is known as
A. Simple harmonic oscillator
B. Compound harmonic oscillator
C. Physical harmonic oscillator
D. driven harmonic oscillator

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