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

In compressional wave,the layer of medium having reduced pressure is called:

Question # 2

The phase determines the

Question # 3

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

Question # 4

SI unit of frequency is

Question # 5

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

Question # 6

Acceleration of the mass at any instant is given by

Question # 7

If F=0.04 N and X=4 cm then K=

Question # 8

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

Question # 9

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 # 10

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 # 11

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

Question # 12

The portion of the water above its mean level forms a:

Question # 13

The resonance will be sharp, if the amplitude decreases rapidly at a frequency

Question # 14

Progressive waves of frequency 300 Hz are superimposed in produced a system of stationary waves in which adjacent nodes are 1.5 m apart. What is the speed of the progressive waves?

Question # 15

In the resonance condition, the amplitude of the oscillator becomes

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The restoring force always directed towards the
A. extreme position
B. mean position
C. both of them
D. none of them
2 An object undergoes S.H.M has maximum acceleration when its displacement form the means position
A. maximum
B. zero
C. half of the maximum value
D. one third of the maximum value
3 Shock absorber of the car is an example of
A. resonance
B. forced oscillations
C. interference
D. damped oscillations
4 Which of the following does not exhibit S.H.M?
A. a plucked violin string
B. a mass attached to a spring
C. a train shunting between two terminals
D. a simple pendulum
5 The time required to complete on vibration is called
A. frequency
B. total time
C. time period
D. velocity
6 A swing has
A. one natural frequency
B. two natural frequencies
C. three natural frequencies
D. four natural frequencies
7 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
8 An object undergoes S.H.M has maximum speed when its displacement from the mean position is
A. maximum
B. zero
C. half of the maximum value
D. one third of the maximum value
9 Energy is not carried by
A. Transverse progressive waves
B. Longitudinal vibration
C. Stationary waves
D. Electromagnetic
10 Two sources of sound are said to be coherent if
A. The produce sounds of equal intensity
B. They produce sounds of equal frequency
C. They produce sound waves vibrating with the same phase
D. They produce sound waves with zero or constant phase difference all instant of time

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