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

If the displacement of a body executing S.H.M is plotted against time, then the curve is known as

Question # 2

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

Question # 3

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

Question # 4

If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are:

Question # 5

The velocity of sound in air not effected by changes in

Question # 6

The expression for restoring force is

Question # 7

Decibel is unit of

Question # 8

The waves in which the particles of the medium have displacement along the direction of propagation of waves are called

Question # 9

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

Question # 10

Which one of the following is an example of resonance

Question # 11

The square of 0.4 is:

Question # 12

A heavily damped system has a fairly

Question # 13

The waves moving from a sitar to a listener in air are

Question # 14

It is possible to recognize a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice

Question # 15

When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 At 'resonance' the transfer of energy from deriving source to the oscillator is
A. maximum
B. minimum
C. zero
D. none of them
2 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
3 If we increase the length of a simple pendulum four times, its time period will become
A. 2 times
B. 3 times
C. 4 times
D. 6 times
4 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
A. rotatory motion
B. motion under gravity
C. angular motion
D. simple harmonic motion
5 The process in which energy is dissipated from the oscillating system is known as
A. resonance
B. interference
C. diffraction
D. damping
6 If the time period a simple pendulum is 2 s, its frequency would be
A. 2 Hz
B. 1.5 Hz
C. 1.0 Hz
D. 0.5 Hz
7 With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are
A. Energy, momentum and mass
B. Energy
C. Energy and mass
D. Energy and linear momentum
8 Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?
A. 400 m/sec
B. 40 m/sec
C. 430 m/sec
D. 300 m/sec
9 The distance covered by the wave in one second is:
A. Wave number
B. Wave length
C. Frequency
D. Wave speed
10 The phase determines the
A. displacement
B. amplitude
C. frequency
D. state of motion of vibrating body

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