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 ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

Question # 2

Example of progressive wave is

Question # 3

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

Question # 4

If a wave can be polarized, it must be

Question # 5

Such oscillations in which the amplitude decreases steadily with time, are called

Question # 6

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

Question # 7

Which one is not produced by sound waves in air?

Question # 8

In the same medium, velocity of the wave:

Question # 9

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

Question # 10

The principle of superposition states that

Question # 11

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

Question # 12

One complete round trip of the body about its mean position is called

Question # 13

The time period of pendulums of different lengths would be

Question # 14

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

Question # 15

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

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The waves which propagate through the oscillations of material particles are known as:
A. Mechanical waves
B. Electromagnetic waves
C. Any of them
D. None of them
2 While describing the motion of a simple pendulum, the frictional effects are
A. taken into account
B. completely ignored
C. partially ignored
D. none of them
3 The square of 0.4 is:
A. Greater than 0.4
B. Smaller than 0.4
C. Equal to 0.4
D. None of them
4 Which one is not produced by sound waves in air?
A. Polarization
B. Diffraction
C. Refraction
D. Reflection
5 The waves which propagate out in the space due to oscillations of electric and magnetic fields are called:
A. Mechanical waves
B. Electromagnetic waves
C. Matter waves
D. All of them
6 Two sound waves of slightly different frequencies propagating in the same direction produce beats due to
A. Interference
B. Diffraction
C. Polarization
D. Refraction
7 For production of beats the two sources must have
A. Different frequencies and same amplitude
B. Different frequencies
C. Different frequencies, same amplitude and same phase
D. Different frequencies and same phase
8 Mechanical waves on the surface of a liquid are
A. Transverse
B. Longitudinal
C. Torsional
D. both transverse and longitudinal
9 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?
A. 103
B. 106
C. 109
D. 1012
10 Which of the following is not mechanical wave?
A. Sound wave
B. Light wave
C.
wave produced in spring
D. None of them

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