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

Sound waves in air always

Question # 2

The velocity of sound at same temperature is maximum in

Question # 3

If a simple pendulum is shifted from karachi to K-2 cliff, its time period

Question # 4

Which of the following changes at an antinode in a stationary wave?

Question # 5

The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

Question # 6

Which of the following is not mechanical wave?

Question # 7

To hear a clear echo, the reflecting surface must be at a minimum distance of

Question # 8

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

Question # 9

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

Question # 10

The example of mechanical wave is

Question # 11

A wave, which transfer energy by moving away from the source of disturbance is called a

Question # 12

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

Question # 13

When a body is pulled away from its rest or equilibrium position and then released, the body oscillates due to

Question # 14

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

Question # 15

The time required to complete on vibration is called

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The damping depends upon the
A. amplitude
B. sharpness
C. both of them
D. none of them
2 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
3 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
4 In compressional wave,the layer of medium having reduced pressure is called:
A. Compression
B. Elasticity
C. Node
D. Rarefaction
5 The waves which propagate through the oscillations of material particles are known as:
A. Mechanical waves
B. Electromagnetic waves
C. Any of them
D. None of them
6 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
7 Of the following, the option ______ reminds of longitudinal waves.
A. Sound waves
B. Heat waves
C. Electromagnetic waves
D. Light waves
8 Such oscillations in which the amplitude decreases steadily with time, are called
A. resonance
B. force oscillations
C. large oscillations
D. damped oscillations
9 A body is executing free vibrations when it oscilates
A. with the interference of an external force
B. without the interference of an external force
C. with the interference of an internal force
D. none of them
10 If the length of a simple pendulum is 0.25 m its time period would be
A. 1.0 s
B. 2.0 s
C. 3.0 s
D. 4.0 s

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