ECAT Pre General Science Chapter 8 online mcq test with answers for Physics chapter 8 (Waves)

Question # 1

The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as

longitudinal waves A
transverse waves B
non-mechanical waves C
none of them D

Question # 2

A weakly damped system has fairly

sharp resonance curve A
flat resonance curve B
both of them C
none of them D

Question # 3

Mechanical waves on the surface of a liquid are

Transverse A
Longitudinal B
Torsional C
both transverse and longitudinal D

Question # 4

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

Crest A
Trough B
Both A and B C
None of these D

Question # 5

One complete round trip of the body about its mean position is called

displacement A
vibration B
a complete motion C
an acceleration D

Question # 6

Acceleration of the mass at any instant is given by

a=k/m x A
a= - m/k x B
a = - k/m x C
a=m/k x D

Question # 7

Which of the following is not mechanical wave?

Sound wave A
Light wave B
wave produced in spring
C
None of them D

Question # 8

With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are

Energy, momentum and mass A
Energy B
Energy and mass C
Energy and linear momentum D

Question # 9

When sound waves travel from air to water which of these remains constant?

Velocity A
Frequency B
Wavelength C
All the above D

Question # 10

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

maximum A
minimum B
zero C
none of them D

Question # 11

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

Increasing by a factor of 2 A
Decreasing by a factor of 2 B
Decreasing by a factor of 4 C
Unchanged D

Question # 12

The wave motion set up in any medium depends upon:

Elasticity A
Inertia B
Density C
All of these D

Question # 13

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

rotatory motion A
motion under gravity B
angular motion C
simple harmonic motion D

Question # 14

The expression for restoring force is

F=ma A
F=kx B
F= -kx C
Kx=ma D

Question # 15

In transverse waves, the individual particles of the medium move:

In circles A
Perpendicular to the direction of level B
Parallel to the direction of level C
None of these D

Question # 16

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

360 m/s A
306 m/s B
331 m/s C
340 ms D

Question # 17

Crests and troughs are formed in:

Longitudinal waves A
Transverse waves B
Both of these C
None of these D

Question # 18

For transmission of both transverse and longitudinal waves, we can use:

Solid A
Gas B
Plasma C
None of these D

Question # 19

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

Compression A
Elasticity B
Node C
Rarefaction D

Question # 20

The vibratory or oscillatory motion of a body is

translatory motion A
back and forth motion about its mean position B
free all motion C
circular motion D

Question # 21

The waves which propagate by the collision of material particles are known as

e.m. waves A
mechanical waves B
light waves C
microwaves D

Question # 22

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?

10³ A
10⁶ B
10⁹ C
10¹² D

Question # 23

While describing the motion of a simple pendulum, the frictional effects are

taken into account A
completely ignored B
partially ignored C
none of them D

Question # 24

A traveling wave has a shape of:

Square wave A
Sine wave B
Parabola C
hyperbola D

Question # 25

When an oscillatory motion repeats itself, then this type of motion is called

vibratory motion A
constant motion B
fixed motion C
periodic motion D

Question # 26

For a body executing S. H. M, its

momentum remains constant A
potential energy remains constant B
kinetic energy remains constant C
total energy remains constant D

Question # 27

The damping depends upon the

amplitude A
sharpness B
both of them C
none of them D

Question # 28

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

Has a definite pitch A
Has a definite quality B
Has a definite capacity C
Can penetrate the wall D

Question # 29

When a mass 'm' is pulled slowly, the spring stretches by an amount x_o, then the work done will be

W=Kx_o A
W=1/2Kx_o B
W=1/2Kx²_o C
W=4Kx_o D

Question # 30

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

very small energy A
very large energy B
frictional forces C
acceleration due to gravity D

Sr.#	Question	Answer
1	What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?	A. 1 MHz B. 10 Hz C. 1 GHz D. 100000 Hz
2	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
3	When a mass 'm' is pulled slowly through a distance 'x_o' , the elastic potential energy of the spring would be	A. P.E=Kx²_o B. P.E= 1/2kx_o C. P.E=1/2Kx²_o D. P.E=Kx²_o
4	Which of the following is not mechanical wave?	A. Sound wave B. Light wave C. wave produced in spring D. None of them
5	When an oscillatory motion repeats itself, then this type of motion is called	A. vibratory motion B. constant motion C. fixed motion D. periodic motion
6	If the displacement of a body executing S.H.M is plotted against time, then the curve is known as	A. frequency of S.H.M B. period of S.H.M C. wave form D. none of them
7	If a simple pendulum is shifted from karachi to K-2 cliff, its time period	A. remains the same B. decreases C. increases D. none of them
8	A heavily damped system has a fairly	A. sharp resonance curve B. flat resonance curve C. both of them D. none of them
9	The wave motion set up in any medium depends upon:	A. Elasticity B. Inertia C. Density D. All of these
10	Decibel is unit of	A. Intensity of light B. x-ray radiation capacity C. sound loudness D. Energy of radiation

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ECAT Pre General Science Physics Chapter 8 MCQ Test With Answer

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

ECAT Pre General Science Physics Chapter 8 Waves

The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as

A weakly damped system has fairly

Mechanical waves on the surface of a liquid are

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

One complete round trip of the body about its mean position is called

Acceleration of the mass at any instant is given by

Which of the following is not mechanical wave?

With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are

When sound waves travel from air to water which of these remains constant?

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

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

The wave motion set up in any medium depends upon:

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

The expression for restoring force is

In transverse waves, the individual particles of the medium move:

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

Crests and troughs are formed in:

For transmission of both transverse and longitudinal waves, we can use:

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

The vibratory or oscillatory motion of a body is

The waves which propagate by the collision of material particles are known as

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?

While describing the motion of a simple pendulum, the frictional effects are

A traveling wave has a shape of:

When an oscillatory motion repeats itself, then this type of motion is called

For a body executing S. H. M, its

The damping depends upon the

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

When a mass 'm' is pulled slowly, the spring stretches by an amount xo, then the work done will be

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

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When a mass 'm' is pulled slowly, the spring stretches by an amount x_o, then the work done will be