ECAT Pre Computer Science Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 8 Waves

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ECAT Physics Chapter 8 Waves

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Question # 1

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

Question # 2

The restoring force always directed towards the

Question # 3

The vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called

Question # 4

SI unit of frequency is

Question # 5

The velocity of sound in air not effected by changes in

Question # 6

The square of 0.4 is:

Question # 7

It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be

Question # 8

In the formula for finding the speed of waves in the spring, unit of m in SIn units is:

Question # 9

In the resonance condition, the amplitude of the oscillator becomes

Question # 10

Which one of the following could be the frequency of ultraviolet radiation?

Question # 11

Which of the following changes at an antinode in a stationary wave?

Question # 12

The waves which propagate by the collision of material particles are known as

Question # 13

The waves which propagate out in the space due to oscillations of electric and magnetic fields are called:

Question # 14

The weight 'mg' of the bob is resolved into

Question # 15

The speed of sound in a medium depends on

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as
A. waves
B. beat
C. interference
D. resonance
2 Energy is not carried by
A. Transverse progressive waves
B. Longitudinal vibration
C. Stationary waves
D. Electromagnetic
3 Smaller the damping, greater will be the
A. frequency
B. wavelength
C. amplitude
D. none of them
4 Which of the following medium/media can transmit both transverse and longitudinal waves:
A. Solids
B. Liquids
C. Gases
D. All of them
5 When sound waves travel from air to water which of these remains constant?
A. Velocity
B. Frequency
C. Wavelength
D. All the above
6 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
7 An object undergoes S.H.M has maximum acceleration when its displacement form the means position
A. maximum
B. zero
C. half of the maximum value
D. one third of the maximum value
8 Which one of the following is an example of resonance
A. swing
B. tuning a radio
C. microwave oven
D. all of them
9 Transverse waves can be set up:
A. Solids
B. Liquids
C. Gases
D. All of them
10 The expression of Hook's law is
A. F=ma
B. F=kx
C. F= -kx
D. -kx=ma

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