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 external driving force is periodic with a period compareable to the natural period of the oscillator, then we get

Question # 2

The time required to complete on vibration is called

Question # 3

The velocity of sound is greatest in

Question # 4

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

Question # 5

The square of 0.4 is:

Question # 6

The damping depends upon the

Question # 7

Which one is not produced by sound waves in air?

Question # 8

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

Question # 9

Waves transport energy

Question # 10

When two waves with same frequency and constant phase difference phase difference interfere

Question # 11

Which of the following is an example of a S.H.M?

Question # 12

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

Question # 13

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

Question # 14

The number of vibrating body at any instant from its equilibrium position is called

Question # 15

The waves produced in a microwave oven have wavelength.

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 A wave, which transfer energy by moving away from the source of disturbance is called a
A. progressive wave
B. travelling wave
C. both of them
D. none of them
2 The number of vibrating body at any instant from its equilibrium position is called
A. displacement
B. frequency
C. amplitude
D. time period
3 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°
4 When two progressive waves of nearly same frequencies superimpose and give rise to beats, then
A. Frequency of beat changes with time
B. Frequency of beat changes with location of observer
C. All particles of medium vibrate simple harmonically with frequency equal to the difference between frequencies of component waves
D. Amplitude of vibration of particles at any point changes simple harmonically with frequency equal to difference between two component waves
5 The velocity of sound is greatest in
A. Water
B. Air
C. Vacuum
D. Metal
6 As the bob of the pendulum moves to and fro which of the force is experienced by the bob
A. its weight
B. tension in the string
C. viscous drag force by air
D. all of them
7 Such oscillations in which the amplitude decreases steadily with time, are called
A. resonance
B. force oscillations
C. large oscillations
D. damped oscillations
8 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
9 Through which character we can distinguish the light waves from sound waves
A. Interference
B. Refraction
C. Polarization
D. Reflection
10 Which waves are used in sonography?
A. Microwaves
B. Infra red waved
C. Sound waves
D. Ultrasonic waves

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