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

Question # 1

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 # 2

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 # 3

If F=0.04 N and X=4 cm then K=

1 Nm^-1 A
2 Nm^-1 B
3 Nm^-1 C
4 Nm^-1 D

Question # 4

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is

Sinusoidal shape with amplitude A/3 A
Sinusoidal shape with amplitude A/2 B
Sinusoidal shape with amplitude A C
Straight line D

Question # 5

A heavily damped system has a fairly

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

Question # 6

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

increase A
decreases B
remains constant C
none of them D

Question # 7

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 # 8

Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as

waves A
beat B
interference C
resonance D

Question # 9

Fidelity refers to

Reproduction of original sound A
Reproduction of original image B
Reproduction of music C
Reproduction of a CD from original copy D

Question # 10

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 # 11

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

equal to the resonant frequency A
slight different from the resonant frequency B
greatly different from the resonant frequency C
any one of them D

Question # 12

When a wave is travels from one place to another, it transfers:

Matter A
Energy B
Momentum C
Both B and C D

Question # 13

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

Longitudinal wave A
Transverse wave B
Progressive wave C
Stationary wave D

Question # 14

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

Interference A
Refraction B
Polarization C
Reflection D

Question # 15

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 # 16

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

applied force A
momentum B
restoring force C
none of them D

Question # 17

Si units of time period is

second A
hertz B
revolution C
vibration/sec D

Question # 18

The distance covered by the wave during one period is called its:

Wave number A
Frequency B
Wavelength C
Time period D

Question # 19

The example of mechanical wave is

waves in ropes A
waves on water surface B
waves in air C
all of them D

Question # 20

The velocity of sound in air not effected by changes in

Moisture contents in air A
Temperature of air B
The atmosphere pressure C
The composition of air D

Question # 21

The expression of Hook's law is

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

Question # 22

The velocity of sound is greatest in

Water A
Air B
Vacuum C
Metal D

Question # 23

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

Question # 24

The total energy of spring mass system is

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

Question # 25

If a wave can be polarized, it must be

An electromagnetic wave A
A longitudinal wave B
A progressive wave C
A transverse wave 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 expression for restoring force is

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

Question # 28

For production of beats the two sources must have

Different frequencies and same amplitude A
Different frequencies B
Different frequencies, same amplitude and same phase C
Different frequencies and same phase D

Question # 29

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 # 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	As the bob of the pendulum moves to and fro which of the force is experienced by the bob	A. its weight B. tension in the string C. viscous drag force by air D. all of them
2	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
3	The velocity of sound in air not effected by changes in	A. Moisture contents in air B. Temperature of air C. The atmosphere pressure D. The composition of air
4	The force which opposes the applied force producing the displacement in the spring is called	A. restoring force B. periodic force C. centripetal force D. resistive force
5	Fidelity refers to	A. Reproduction of original sound B. Reproduction of original image C. Reproduction of music D. Reproduction of a CD from original copy
6	Si units of time period is	A. second B. hertz C. revolution D. vibration/sec
7	The principle of superposition states that	A. The total displacement due to several waves is the sum of the displacement due to those waves acting individually B. Two stationary waves superimpose to give two progressive waves C. A diffraction pattern consists of many interference patterns superimposed on one another D. Two progressive waves superimpose to give a stationary wave
8	The process in which energy is dissipated from the oscillating system is known as	A. resonance B. interference C. diffraction D. damping
9	In compressional wave,the layer of medium having reduced pressure is called:	A. Compression B. Elasticity C. Node D. Rarefaction
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