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

Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?

Question # 2

A weakly damped system has fairly

Question # 3

In case of mechanical waves, we study the motion of

Question # 4

Example of vibratory motion is

Question # 5

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

Question # 6

Crests and troughs are formed in:

Question # 7

The vibratory or oscillatory motion of a body is

Question # 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?

Question # 9

The waves produced in a microwave oven have wavelength.

Question # 10

In the resonance condition, the amplitude of the oscillator becomes

Question # 11

When the bob of simple pendulum is at mean position, its K.E will be

Question # 12

When the bob of simple pendulum is at extreme position, its K.E. will be

Question # 13

Which one of the following could be the frequency of ultraviolet radiation?

Question # 14

Which waves are used in sonography?

Question # 15

Smaller the damping, greater will be the

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Smaller the damping, the resonance will be
A. more flat
B. more sharp
C. both of them
D. none of them
2 Laplace formula is derived from
A. Isothermal change
B. Adiabatic change
C. Isobaric change
D. None of these
3 When a body moves to and fro motion, this type of motion is called
A. translatory motion
B. circular motion
C. oscillatory motion
D. all of them
4 When a body is performing S.H.M., its acceleration is
A. inversely proportional to the displacement
B. directly proportional to the applied force
C. directly proportional to the amplitude
D. directly proportional to the displacement but in opposite direction
5 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°
6 The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be
A. 1 : 2
B. 4 : 1
C. 1 : 4
D. 2 : 1
7 If the length of second pendulum becomes four times then its time period will become
A. Four time
B. Two times
C. Six times
D. Eight times
8 The example of mechanical wave is
A. waves in ropes
B. waves on water surface
C. waves in air
D. all of them
9 The expression for restoring force is
A. F=ma
B. F=kx
C. F= -kx
D. Kx=ma
10 A simple pendulum consists of a
A. small light bob
B. small heavy bob
C. big light bob
D. big heavy bob

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