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

Question # 1

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 # 2

The frequency of free vibrations is known as

free frequency A
forced frequency B
natural frequency C
un-natural frequency D

Question # 3

Which one of the following wave motions is transverse:

Wave motion produced in water when a piece of stone is thrown into it A
Pulling of weight hanging vertically with a spiral spring B
Both of these C
None of these D

Question # 4

Which of the following medium/media can transmit both transverse and longitudinal waves:

Solids A
Liquids B
Gases C
All of them D

Question # 5

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

Four time A
Two times B
Six times C
Eight times D

Question # 6

Of the following, the option ______ reminds of longitudinal waves.

Sound waves A
Heat waves B
Electromagnetic waves C
Light waves D

Question # 7

The total energy of spring mass system is

zero A
changing with time B
constant C
none of them D

Question # 8

Energy is not carried by

Transverse progressive waves A
Longitudinal vibration B
Stationary waves C
Electromagnetic D

Question # 9

The square of 0.4 is:

Greater than 0.4 A
Smaller than 0.4 B
Equal to 0.4 C
None of them D

Question # 10

The time required to complete on vibration is called

frequency A
total time B
time period C
velocity D

Question # 11

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

1 : 2 A
4 : 1 B
1 : 4 C
2 : 1 D

Question # 12

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

Interference A
Diffraction B
Polarization C
Refraction D

Question # 13

Which type of wave can be set up in solids

longitudinal waves A
transverse waves B
both of them C
none of them D

Question # 14

The wave motion set up in any medium depends upon:

Elasticity A
Inertia B
Density C
All of these D

Question # 15

The expression of Hook's law is

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

Question # 16

When the bob of simple pendulum is at mean position, its K.E will be

maximum A
minimum B
zero C
all of them D

Question # 17

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 # 18

Which of the following is not mechanical wave?

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

Question # 19

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

resonance A
force oscillations B
large oscillations C
damped oscillations D

Question # 20

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

Compression A
Elasticity B
Node C
Rarefaction D

Question # 21

The temperature at which the speed of sound becomes double as was at 27°C is

273°C A
0°C B
927°C C
1027°C D

Question # 22

Through which character we can distinguish the light waves from sound waves

Interference A
Refraction B
Polarization C
Reflection D

Question # 23

Example of vibratory motion is

mass suspended from a spring A
a bob of simple pendulum B
mass attached to a spring placed C
all of them D

Question # 24

The weight 'mg' of the bob is resolved into

one component A
two components B
three components C
four components D

Question # 25

Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at

subsonic speed A
sonic speed B
super sonic speed C
any one of them D

Question # 26

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 # 27

Time period of a simple pendulum depends upon the

length of the pendulum A
acceleration due to gravity B
none of them C
both of them D

Question # 28

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 # 29

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:

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

Question # 30

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

45° A
90° B
135° C
180° D

Sr.#	Question	Answer
1	Si units of time period is	A. second B. hertz C. revolution D. vibration/sec
2	The vibrations of factory floor caused by the running of heavy machinery is an example of	A. free vibration B. natural vibrations C. forced vibrations D. all of them
3	Through which character we can distinguish the light waves from sound waves	A. Interference B. Refraction C. Polarization D. Reflection
4	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:	A. Stationary waves B. Transverse waves C. Both of these D. None of these
5	The natural frequency of a pendulum which is vibrating freely, depends upon its	A. mass B. length C. material D. all of them
6	The total energy of spring mass system is	A. zero B. changing with time C. constant D. none of them
7	Which of the following is not mechanical wave?	A. Sound wave B. Light wave C. wave produced in spring D. None of them
8	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
9	Angular frequency 'w' is basically a characteristics of	A. linear motion B. circular motion C. both of them D. none of them
10	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. longitudinal waves B. transverse waves C. non-mechanical waves D. none of them

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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