ECAT Pre General Science Physics Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 8 Waves

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 8 Waves

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ECAT Pre General Science Physics Chapter 8 Waves

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Question # 1

Which one is not produced by sound waves in air?

Question # 2

A traveling wave has a shape of:

Question # 3

transverse wave motion is possible in:

Question # 4

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

Question # 5

The waves which propagate through the oscillations of material particles are known as:

Question # 6

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

Question # 7

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

Question # 8

The velocity of sound is greatest in

Question # 9

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

Question # 10

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

Question # 11

Which one of the following wave motions is transverse:

Question # 12

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 # 13

If a wave can be polarized, it must be

Question # 14

Which one of the following is an example of resonance

Question # 15

The vibratory or oscillatory motion of a body is

Question # 16

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

Question # 17

For a body executing S. H. M, its

Question # 18

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 # 19

Fluids can transmit:

Question # 20

A physical system under going forced vibrations is known as

Question # 21

Sound waves in air always

Question # 22

The waves produced in a microwave oven have wavelength.

Question # 23

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

Question # 24

Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?

Question # 25

The vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called

Question # 26

Transverse waves can be set up:

Question # 27

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

Question # 28

Smaller the damping, greater will be the

Question # 29

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

Question # 30

The bob of a simple pendulum is suspended by

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 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?
A. 100 ms-1
B. 200 ms-1
C. 450 ms-1
D. 900 ms-1
2 Which waves are used in sonography?
A. Microwaves
B. Infra red waved
C. Sound waves
D. Ultrasonic waves
3 Energy is not carried by
A. Transverse progressive waves
B. Longitudinal vibration
C. Stationary waves
D. Electromagnetic
4 Which of the following changes at an antinode in a stationary wave?
A. Density only
B. Pressure only
C. Both pressure and density
D. Neither pressure nor density
5 Which of the following is an example of a S.H.M?
A. motion of a projectile
B. motion of a train along a circular path
C. motion of swing
D. electrons revolving sound the nucleus
6 Which one of the following could be the frequency of ultraviolet radiation?
A. 1.0 x 106Hz
B. 1.0 x 109Hz
C. 1.0 x 1012Hz
D. 1.0 x 1015Hz
7 The number of vibrating body at any instant from its equilibrium position is called
A. displacement
B. frequency
C. amplitude
D. time period
8 Data transmitted along glass-fiber cables is in the form of pulses of monochromatic red light each of duration 2.5 ns. Which of the following is the best estimate of the number of wavelength in each pulse?
A. 103
B. 106
C. 109
D. 1012
9 When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be
A. 45°
B. 90°
C. 135°
D. 180°
10 Which of the following is the longitudinal waves?
A. Sound waves
B. Waves on plucked string
C. Water waves
D. Light waves

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