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

Two sources of sound are said to be coherent if

Question # 2

The resonance will be sharp, if the amplitude decreases rapidly at a frequency

Question # 3

Time period of simple pendulum is independent of

Question # 4

Data transmitted along glass-fiber cables is in the form of pulses of monochromatic red light each of duration 2.5 ns. Which of the following is the best estimate of the number of wavelength in each pulse?

Question # 5

Which of the following is not mechanical wave?

Question # 6

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

Question # 7

When a mass 'm' is pulled slowly through a distance 'xo' , the elastic potential energy of the spring would be

Question # 8

Acceleration of the mass at any instant is given by

Question # 9

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

Question # 10

SI unit of wave length is:

Question # 11

Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator

Question # 12

When two waves with same frequency and constant phase difference phase difference interfere

Question # 13

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

Question # 14

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

Question # 15

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

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 A wave, which transfer energy by moving away from the source of disturbance is called a
A. progressive wave
B. travelling wave
C. both of them
D. none of them
2 When temperature increase, the frequency of a tuning fork
A. Increases
B. Decreases
C. Remains same
D. Increase or decreases depending on the material
3 The wave form of S.H.M will be
A. square wave
B. sine wave
C. rectified wave
D. saw-tooth wave
4 For a body executing S. H. M, its
A. momentum remains constant
B. potential energy remains constant
C. kinetic energy remains constant
D. total energy remains constant
5 When a mass 'm' is pulled slowly, the spring stretches by an amount x0,then the average force would be
A. F= Kx0
B. F=1/2Kx0
C. F=2Kx0
D. F=4Kx0
6 Energy is not carried by
A. Transverse progressive waves
B. Longitudinal vibration
C. Stationary waves
D. Electromagnetic
7 The distance covered by the wave in one second is:
A. Wave number
B. Wave length
C. Frequency
D. Wave speed
8 Transverse waves can be set up:
A. Solids
B. Liquids
C. Gases
D. All of them
9 Smaller the damping, greater will be the
A. frequency
B. wavelength
C. amplitude
D. none of them
10 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

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