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

A weakly damped system has fairly

Question # 2

Velocity of sound in vacuum (in m/s) is

Question # 3

A wave, which transfer energy by moving away from the source of disturbance is called a

Question # 4

Acceleration of the mass at any instant is given by

Question # 5

SI unit of frequency is

Question # 6

When a body moves to and fro motion, this type of motion is called

Question # 7

If the length of a simple pendulum is 0.25 m its time period would be

Question # 8

The velocity of sound is greatest in

Question # 9

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

Question # 10

For production of beats the two sources must have

Question # 11

While describing the motion of a simple pendulum, the frictional effects are

Question # 12

When two progressive waves of nearly same frequencies superimpose and give rise to beats, then

Question # 13

The instantaneous velocity of a body moving along a circle is directed

Question # 14

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

Question # 15

The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be
A. Increasing by a factor of 2
B. Decreasing by a factor of 2
C. Decreasing by a factor of 4
D. Unchanged
2 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
3 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
4 The wave form of S.H.M will be
A. square wave
B. sine wave
C. rectified wave
D. saw-tooth wave
5 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
6 Velocity of sound in vacuum (in m/s) is
A. 330
B. 1000
C. 156
D. 0
7 Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of
A. very small energy
B. very large energy
C. frictional forces
D. acceleration due to gravity
8 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
9 Sound waves in air always
A. Longitudinal
B. Transverse
C. Stationary
D. Electromagnetic
10 One complete round trip of the body about its mean position is called
A. displacement
B. vibration
C. a complete motion
D. an acceleration

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