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

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

Question # 2

A weakly damped system has fairly

Question # 3

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

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

The restoring force always directed towards the

Question # 6

Such oscillations in which the amplitude decreases steadily with time, are called

Question # 7

If the length of second pendulum becomes four times then its time period will become

Question # 8

At 'resonance' the transfer of energy from deriving source to the oscillator is

Question # 9

The wave form of S.H.M will be

Question # 10

Which type of wave can be set up in solids

Question # 11

The principle of superposition states that

Question # 12

Waves transport energy

Question # 13

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

Question # 14

When a mass 'm' is pulled slowly, the spring stretches by an amount x0,then the average force would be

Question # 15

Two sources of sound are said to be coherent if

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The phase determines the
A. displacement
B. amplitude
C. frequency
D. state of motion of vibrating body
2 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
3 If two waves of length 50 cm and 51 cm produced 12 beats per second, the velocity of sound is
A. 360 m/s
B. 306 m/s
C. 331 m/s
D. 340 ms
4 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
5 Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at
A. subsonic speed
B. sonic speed
C. super sonic speed
D. any one of them
6 In stationary waves
A. Energy is uniformly distributed
B. Energy is minimum at nodes and maximum at antinodes
C. Energy is maximum at nodes and minimum at antidotes
D. Alternating maximum and minimum energy producing at nodes and antinodes
7 The damping depends upon the
A. amplitude
B. sharpness
C. both of them
D. none of them
8 In solids, only following type/s of wave can travel:
A. Transverse
B. Longitudinal
C. Both A and B
D. None of them
9 A traveling wave has a shape of:
A. Square wave
B. Sine wave
C. Parabola
D. hyperbola
10 When a mass 'm' is pulled slowly, the spring stretches by an amount xo, then the work done will be
A. W=Kxo
B. W=1/2Kxo
C. W=1/2Kx2o
D. W=4Kxo

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