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

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

Question # 2

If the displacement of a body executing S.H.M is plotted against time, then the curve is known as

Question # 3

A heavily damped system has a fairly

Question # 4

Time period of simple pendulum is independent of

Question # 5

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

Question # 6

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

Question # 7

If the length of a simple pendulum is 0.25 m its time period would be

Question # 8

The instantaneous velocity of a body moving along a circle is directed

Question # 9

If two waves of length 50 cm and 51 cm produced 12 beats per second, the velocity of sound is

Question # 10

Which of the following is the longitudinal waves?

Question # 11

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

Question # 12

Laplace formula is derived from

Question # 13

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

Question # 14

The natural frequency of a pendulum which is vibrating freely, depends upon its

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 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
2 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
3 There is no net transfer of energy by particle of medium in
A. Longitudinal wave
B. Transverse wave
C. Progressive wave
D. Stationary wave
4 If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be
A. Increasing by a factor of 2
B. Decreasing by a factor of 2
C. Decreasing by a factor of 4
D. Unchanged
5 The time period of pendulums of different lengths would be
A. same
B. different
C. both of them
D. none of them
6 Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator
A. greater than the frequency of applied force
B. equal to the frequency of applied force
C. less than the frequency of applied force
D. all of them
7 Mechanical waves on the surface of a liquid are
A. Transverse
B. Longitudinal
C. Torsional
D. both transverse and longitudinal
8 A weakly damped system has fairly
A. sharp resonance curve
B. flat resonance curve
C. both of them
D. none of them
9 A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:
A. Longitudinal wave
B. Transverse wave
C. No vibration at all
D. None of them
10 Which one of the following wave motions is transverse:
A. Wave motion produced in water when a piece of stone is thrown into it
B. Pulling of weight hanging vertically with a spiral spring
C. Both of these
D. None of these

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