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

Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as

Question # 2

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

Question # 3

Acceleration of the mass at any instant is given by

Question # 4

The restoring force always directed towards the

Question # 5

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

Question # 6

When the bob of simple pendulum is at extreme position, its K.E. will be

Question # 7

Mechanical waves on the surface of a liquid are

Question # 8

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

Question # 9

The frequency of free vibrations is known as

Question # 10

Waves transport energy

Question # 11

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 # 12

Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of

Question # 13

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

Question # 14

The vibratory or oscillatory motion of a body is

Question # 15

transverse wave motion is possible in:

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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 When a body moves to and fro motion, this type of motion is called
A. translatory motion
B. circular motion
C. oscillatory motion
D. all of them
3 Fluids can transmit:
A. Transverse wave
B. Compressional wave
C. Both of them
D. None of them
4 The waves produced in a microwave oven have frequency
A. 2450 Hz
B. 2450 K Hz
C. 2450 M Hz
D. 2450 G Hz
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 Shock absorber of the car is an example of
A. resonance
B. forced oscillations
C. interference
D. damped oscillations
7 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
8 It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be
A. 60°
B. 90°
C. 120°
D. 180°
9 Example of vibratory motion is
A. mass suspended from a spring
B. a bob of simple pendulum
C. mass attached to a spring placed
D. all of them
10 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

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