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

Question # 1

Which of the following is the longitudinal waves?

Sound waves A
Waves on plucked string B
Water waves C
Light waves D

Question # 2

When two progressive waves of nearly same frequencies superimpose and give rise to beats, then

Frequency of beat changes with time A
Frequency of beat changes with location of observer B
All particles of medium vibrate simple harmonically with frequency equal to the difference between frequencies of component waves C
Amplitude of vibration of particles at any point changes simple harmonically with frequency equal to difference between two component waves D

Question # 3

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 # 4

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 # 5

The time required to complete on vibration is called

frequency A
total time B
time period C
velocity D

Question # 6

The wave motion set up in any medium depends upon:

Elasticity A
Inertia B
Density C
All of these D

Question # 7

The velocity of sound in air depends upon

Density and elasticity of gas A
Pressure B
Wavelength C
Amplitude and frequency of sound D

Question # 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?

10³ A
10⁶ B
10⁹ C
10¹² 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

The phase determines the

displacement A
amplitude B
frequency C
state of motion of vibrating body D

Question # 11

The principle of superposition states that

The total displacement due to several waves is the sum of the displacement due to those waves acting individually A
Two stationary waves superimpose to give two progressive waves B
A diffraction pattern consists of many interference patterns superimposed on one another C
Two progressive waves superimpose to give a stationary wave D

Question # 12

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

Solids A
Liquids B
Gases C
All of them D

Question # 13

In the production of beats by 2 waves of same amplitude and nearly same frequency, the maximum intensity to each of the constituent waves is

Same A
2 times B
4 times C
8 times D

Question # 14

Which one is not produced by sound waves in air?

Polarization A
Diffraction B
Refraction C
Reflection D

Question # 15

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 # 16

Time period of simple pendulum is independent of

length A
mass B
acceleration due to gravity C
none of them D

Question # 17

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 # 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:

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

Question # 19

Which one of the following is an example of resonance

swing A
tuning a radio B
microwave oven C
all of them D

Question # 20

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

Mechanical waves A
Electromagnetic waves B
Any of them C
None of them D

Question # 21

The bob of a simple pendulum is suspended by

string A
heavy inextensible string B
light extensible string C
light inextensible string D

Question # 22

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

Density only A
Pressure only B
Both pressure and density C
Neither pressure nor density D

Question # 23

If the mass of the simple pendulum becomes double, its time period

increase A
decreases B
remains constant C
none of them D

Question # 24

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

Longitudinal waves A
Transverse waves B
Water waves C
Complex waves D

Question # 25

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 # 26

When a body is performing S.H.M., its acceleration is

inversely proportional to the displacement A
directly proportional to the applied force B
directly proportional to the amplitude C
directly proportional to the displacement but in opposite direction D

Question # 27

The time period of pendulums of different lengths would be

same A
different B
both of them C
none of them D

Question # 28

Smaller the damping, greater will be the

frequency A
wavelength B
amplitude C
none of them D

Question # 29

The waves moving from a sitar to a listener in air are

Longitudinal progressive A
Longitudinal stationary B
Transverse progressive C
Transverse stationary D

Question # 30

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

displacement A
vibration B
a complete motion C
an acceleration D

Sr.#	Question	Answer
1	The vibratory or oscillatory motion of a body is	A. translatory motion B. back and forth motion about its mean position C. free all motion D. circular motion
2	In the same medium, velocity of the wave:	A. Goes on increasing B. Remains constant C. Goes on decreasing D. None of these
3	Which of the following is/are example/s if mechanical waves i.e. waves generated in _______:	A. Rope B. Coil of spring C. Water D. All of them
4	With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are	A. Energy, momentum and mass B. Energy C. Energy and mass D. Energy and linear momentum
5	Which of the following is not mechanical wave?	A. Sound wave B. Light wave C. wave produced in spring D. None of them
6	Which one is not produced by sound waves in air?	A. Polarization B. Diffraction C. Refraction D. Reflection
7	When the bob of simple pendulum is at extreme position, its K.E. will be	A. maximum B. minimum C. zero D. all of them
8	The wave form of S.H.M will be	A. square wave B. sine wave C. rectified wave D. saw-tooth wave
9	The bob of a simple pendulum is suspended by	A. string B. heavy inextensible string C. light extensible string D. light inextensible string
10	The distance covered by the wave during one period is called its:	A. Wave number B. Frequency C. Wavelength D. Time period

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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