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

Crests and troughs are formed in:

Question # 2

In solids, only following type/s of wave can travel:

Question # 3

The speed of sound in a medium depends on

Question # 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

Question # 5

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

Question # 6

The velocity of sound in air depends upon

Question # 7

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

Question # 8

Time period of simple pendulum is independent of

Question # 9

Acceleration of the mass at any instant is given by

Question # 10

Shock absorber of the car is an example of

Question # 11

Time period of a simple pendulum depends upon the

Question # 12

There is no net transfer of energy by particle of medium in

Question # 13

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

Question # 14

The phase determines the

Question # 15

The expression for restoring force is

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Sr.# Question Answer
1 Which one of the following elasticizes is possessed by fluids:
A. Young's elastic modulus (length)
B. Bulk elastic modulus (volume)
C. Modulus of rigidity (shape)
D. None of these
2 Fluids can transmit:
A. Transverse wave
B. Compressional wave
C. Both of them
D. None of them
3 Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of
A. very small energy
B. very large energy
C. frictional forces
D. acceleration due to gravity
4 The velocity of sound is greatest in
A. Water
B. Air
C. Vacuum
D. Metal
5 A traveling wave has a shape of:
A. Square wave
B. Sine wave
C. Parabola
D. hyperbola
6 In the formula for finding the speed of waves in the spring, unit of m in SIn units is:
A. kg
B. kg-meter
C. kg/meter
D. Meter/kg
7 The expression for restoring force is
A. F=ma
B. F=kx
C. F= -kx
D. Kx=ma
8 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°
9 The restoring force always directed towards the
A. extreme position
B. mean position
C. both of them
D. none of them
10 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
11 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
12 For production of beats the two sources must have
A. Different frequencies and same amplitude
B. Different frequencies
C. Different frequencies, same amplitude and same phase
D. Different frequencies and same phase
13 Energy is not carried by
A. Transverse progressive waves
B. Longitudinal vibration
C. Stationary waves
D. Electromagnetic
14 The phase determines the
A. displacement
B. amplitude
C. frequency
D. state of motion of vibrating body
15 The frequency of free vibrations is known as
A. free frequency
B. forced frequency
C. natural frequency
D. un-natural frequency

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