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

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 # 2

There is no net transfer of energy by particle of medium in

Question # 3

When a mass 'm' is pulled slowly, the spring stretches by an amount x0,then the average force would be

Question # 4

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

Question # 5

Which of the following changes at an antinode in a stationary wave?

Question # 6

Shock absorber of the car is an example of

Question # 7

Progressive waves of frequency 300 Hz are superimposed in produced a system of stationary waves in which adjacent nodes are 1.5 m apart. What is the speed of the progressive waves?

Question # 8

The velocity of sound at same temperature is maximum in

Question # 9

A heavily damped system has a fairly

Question # 10

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

Question # 11

The process in which energy is dissipated from the oscillating system is known as

Question # 12

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

Question # 13

Through which character we can distinguish the light waves from sound waves

Question # 14

The distance covered by the wave during one period is called its:

Question # 15

In the same medium, velocity of the wave:

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be
A. 45°
B. 90°
C. 135°
D. 180°
2 The force which opposes the applied force producing the displacement in the spring is called
A. restoring force
B. periodic force
C. centripetal force
D. resistive force
3 A heavily damped system has a fairly
A. sharp resonance curve
B. flat resonance curve
C. both of them
D. none of them
4 If a freely oscillating system is subjected to an external force, then
A. free vibrations will take place
B. the body will move with its natural frequency
C. forced vibrations will take place
D. none of them
5 The bob of a simple pendulum is suspended by
A. string
B. heavy inextensible string
C. light extensible string
D. light inextensible string
6 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°
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 The damping depends upon the
A. amplitude
B. sharpness
C. both of them
D. none of them
9 Which one of the following is an example of resonance
A. swing
B. tuning a radio
C. microwave oven
D. all of them
10 If the displacement of a body executing S.H.M is plotted against time, then the curve is known as
A. frequency of S.H.M
B. period of S.H.M
C. wave form
D. none of them

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