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

At 'resonance' the transfer of energy from deriving source to the oscillator is

Question # 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?

Question # 3

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

Question # 4

A traveling wave has a shape of:

Question # 5

The expression of Hook's law is

Question # 6

Mechanical waves on the surface of a liquid are

Question # 7

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

Question # 8

When an oscillatory motion repeats itself, then this type of motion is called

Question # 9

To hear a clear echo, the reflecting surface must be at a minimum distance of

Question # 10

The vibratory or oscillatory motion of a body is

Question # 11

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

Question # 12

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

Question # 13

The velocity of sound in air not effected by changes in

Question # 14

When a body is performing S.H.M., its acceleration is

Question # 15

Si units of time period is

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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 The velocity of sound is greatest in
A. Water
B. Air
C. Vacuum
D. Metal
3 Shock absorber of the car is an example of
A. resonance
B. forced oscillations
C. interference
D. damped oscillations
4 The damping depends upon the
A. amplitude
B. sharpness
C. both of them
D. none of them
5 Crests and troughs are formed in:
A. Longitudinal waves
B. Transverse waves
C. Both of these
D. None of these
6 Which one is not produced by sound waves in air?
A. Polarization
B. Diffraction
C. Refraction
D. Reflection
7 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
8 A swing has
A. one natural frequency
B. two natural frequencies
C. three natural frequencies
D. four natural frequencies
9 When a body is pulled away from its rest or equilibrium position and then released, the body oscillates due to
A. applied force
B. momentum
C. restoring force
D. none of them
10 The expression for restoring force is
A. F=ma
B. F=kx
C. F= -kx
D. Kx=ma

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