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

The characteristic of a body executing S.H.M is that its acceleration is

Question # 2

A swing has

Question # 3

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

Question # 4

The waves which propagate by the collision of material particles are known as

Question # 5

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

Question # 6

The force which opposes the applied force producing the displacement in the spring is called

Question # 7

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

Question # 8

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

Question # 9

The example of mechanical wave is

Question # 10

Decibel is unit of

Question # 11

If a freely oscillating system is subjected to an external force, then

Question # 12

Which of the following is not mechanical wave?

Question # 13

When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be

Question # 14

The principle of superposition states that

Question # 15

In case of mechanical waves, we study the motion of

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Which one is not produced by sound waves in air?
A. Polarization
B. Diffraction
C. Refraction
D. Reflection
2 Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as
A. waves
B. beat
C. interference
D. resonance
3 The frequency of free vibrations is known as
A. free frequency
B. forced frequency
C. natural frequency
D. un-natural frequency
4 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°
5 If we increase the length of a simple pendulum four times, its time period will become
A. 2 times
B. 3 times
C. 4 times
D. 6 times
6 Which one of the following could be the frequency of ultraviolet radiation?
A. 1.0 x 106Hz
B. 1.0 x 109Hz
C. 1.0 x 1012Hz
D. 1.0 x 1015Hz
7 It is possible to recognize a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice
A. Has a definite pitch
B. Has a definite quality
C. Has a definite capacity
D. Can penetrate the wall
8 When an oscillatory motion repeats itself, then this type of motion is called
A. vibratory motion
B. constant motion
C. fixed motion
D. periodic motion
9 Si units of time period is
A. second
B. hertz
C. revolution
D. vibration/sec
10 The restoring force always directed towards the
A. extreme position
B. mean position
C. both of them
D. none of them

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