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

Question # 1

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

Question # 2

Which one is not produced by sound waves in air?

Polarization A
Diffraction B
Refraction C
Reflection D

Question # 3

The velocity of sound at same temperature is maximum in

H₂ A
N₂ B
O₂ C
NH₃ D

Question # 4

In the formula for finding the speed of waves in the spring, unit of m in SIn units is:

kg A
kg-meter B
kg/meter C
Meter/kg D

Question # 5

The expression for restoring force is

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

Question # 6

In the same medium, velocity of the wave:

Goes on increasing A
Remains constant B
Goes on decreasing C
None of these D

Question # 7

The natural frequency of a pendulum which is vibrating freely, depends upon its

mass A
length B
material C
all of them D

Question # 8

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 # 9

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 # 10

In stationary waves

Energy is uniformly distributed A
Energy is minimum at nodes and maximum at antinodes B
Energy is maximum at nodes and minimum at antidotes C
Alternating maximum and minimum energy producing at nodes and antinodes D

Question # 11

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

F= Kx₀ A
F=1/2Kx₀ B
F=2Kx₀ C
F=4Kx₀ D

Question # 12

A heavily damped system has a fairly

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

Question # 13

If we increase the length of a simple pendulum four times, its time period will become

2 times A
3 times B
4 times C
6 times D

Question # 14

A physical system under going forced vibrations is known as

Simple harmonic oscillator A
Compound harmonic oscillator B
Physical harmonic oscillator C
driven harmonic oscillator D

Question # 15

Which one of the following elasticizes is possessed by fluids:

Young's elastic modulus (length) A
Bulk elastic modulus (volume) B
Modulus of rigidity (shape) C
None of these D

Question # 16

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

e.m. waves A
mechanical waves B
sound waves C
water waves D

Question # 17

When two waves with same frequency and constant phase difference phase difference interfere

There is a gain of energy A
There is a loss of energy B
The energy is redistributed and the distribution changes with time C
The energy is redistributed and the distribution remains constant with time D

Question # 18

The velocity of sound is greatest in

Water A
Air B
Vacuum C
Metal D

Question # 19

In solids, only following type/s of wave can travel:

Transverse A
Longitudinal B
Both A and B C
None of them D

Question # 20

The waves produced in a microwave oven have frequency

2450 Hz A
2450 K Hz B
2450 M Hz C
2450 G Hz D

Question # 21

The total energy of spring mass system is

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

Question # 22

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 # 23

Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator

greater than the frequency of applied force A
equal to the frequency of applied force B
less than the frequency of applied force C
all of them D

Question # 24

In case of mechanical waves, we study the motion of

a single particle A
collection of particle B
any one of them C
none of them D

Question # 25

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

400 m/sec A
40 m/sec B
430 m/sec C
300 m/sec D

Question # 26

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

resonance A
force oscillations B
large oscillations C
damped oscillations D

Question # 27

Ultra-violet rays differ from X-rays in that they

Cannot be diffracted A
Cannot be polarized B
Have a lower frequency C
Are deviated when they pass through a magnetic field D

Question # 28

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 # 29

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 # 30

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

Sr.#	Question	Answer
1	There is no net transfer of energy by particle of medium in	A. Longitudinal wave B. Transverse wave C. Progressive wave D. Stationary wave
2	Such oscillations in which the amplitude decreases steadily with time, are called	A. resonance B. force oscillations C. large oscillations D. damped oscillations
3	If we increase the length of a simple pendulum four times, its time period will become	A. 2 times B. 3 times C. 4 times D. 6 times
4	The time required to complete on vibration is called	A. frequency B. total time C. time period D. velocity
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	The wave form of S.H.M will be	A. square wave B. sine wave C. rectified wave D. saw-tooth wave
7	Laplace formula is derived from	A. Isothermal change B. Adiabatic change C. Isobaric change D. None of these
8	When a body moves to and fro motion, this type of motion is called	A. translatory motion B. circular motion C. oscillatory motion D. all of them
9	The loudness and pitch of a sound note depends on	A. Intensity and velocity B. Frequency and velocity C. Intensity and frequency D. Frequency and number of harmonic
10	When a body is performing S.H.M., its acceleration is	A. inversely proportional to the displacement B. directly proportional to the applied force C. directly proportional to the amplitude D. directly proportional to the displacement but in opposite direction

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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

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

Which one is not produced by sound waves in air?

The velocity of sound at same temperature is maximum in

In the formula for finding the speed of waves in the spring, unit of m in SIn units is:

The expression for restoring force is

In the same medium, velocity of the wave:

The natural frequency of a pendulum which is vibrating freely, depends upon its

Which type of wave can be set up in solids

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

In stationary waves

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

A heavily damped system has a fairly

If we increase the length of a simple pendulum four times, its time period will become

A physical system under going forced vibrations is known as

Which one of the following elasticizes is possessed by fluids:

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

When two waves with same frequency and constant phase difference phase difference interfere

The velocity of sound is greatest in

In solids, only following type/s of wave can travel:

The waves produced in a microwave oven have frequency

The total energy of spring mass system is

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

Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator

In case of mechanical waves, we study the motion of

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

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

Ultra-violet rays differ from X-rays in that they

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

The vibratory or oscillatory motion of a body is

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

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