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 length of second pendulum becomes four times then its time period will become

Question # 2

The phase determines the

Question # 3

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

Question # 4

In a resonance situation the amplitude of the motion may become extra ordinarily large, if

Question # 5

Ultra-violet rays differ from X-rays in that they

Question # 6

Mechanical waves on the surface of a liquid are

Question # 7

It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be

Question # 8

An object undergoes S.H.M has maximum speed when its displacement from the mean position is

Question # 9

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 # 10

Which of the following is not mechanical wave?

Question # 11

SI unit of frequency is

Question # 12

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

Question # 13

In the resonance condition, the amplitude of the oscillator becomes

Question # 14

Fluids can transmit:

Question # 15

The waves produced in a microwave oven have frequency

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The vibratory or oscillatory motion of a body is
A. translatory motion
B. back and forth motion about its mean position
C. free all motion
D. circular motion
2 In a resonance situation the amplitude of the motion may become extra ordinarily large, if
A. the driving force is large
B. the driving force is zero
C. the driving force may be feeble
D. all of them
3 Ultra-violet rays differ from X-rays in that they
A. Cannot be diffracted
B. Cannot be polarized
C. Have a lower frequency
D. Are deviated when they pass through a magnetic field
4 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
5 One complete round trip of the body about its mean position is called
A. displacement
B. vibration
C. a complete motion
D. an acceleration
6 When a wave is travels from one place to another, it transfers:
A. Matter
B. Energy
C. Momentum
D. Both B and C
7 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
8 Which of the following changes at an antinode in a stationary wave?
A. Density only
B. Pressure only
C. Both pressure and density
D. Neither pressure nor density
9 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
10 Which one is not produced by sound waves in air?
A. Polarization
B. Diffraction
C. Refraction
D. Reflection

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