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

Question # 1

In a resonance situation the amplitude of the motion may become extra ordinarily large, if

the driving force is large A
the driving force is zero B
the driving force may be feeble C
all of them D

Question # 2

What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?

1 MHz A
10 Hz B
1 GHz C
100000 Hz D

Question # 3

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 # 4

The damping depends upon the

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

Question # 5

It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be

60° A
90° B
120° C
180° D

Question # 6

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 # 7

A traveling wave has a shape of:

Square wave A
Sine wave B
Parabola C
hyperbola D

Question # 8

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

Longitudinal wave A
Transverse wave B
No vibration at all C
None of them D

Question # 9

The waves in which the particles of the medium have displacement along the direction of propagation of waves are called

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

Question # 10

If the time period a simple pendulum is 2 s, its frequency would be

2 Hz A
1.5 Hz B
1.0 Hz C
0.5 Hz D

Question # 11

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 # 12

The frequency of free vibrations is known as

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

Question # 13

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 # 14

Which one is not produced by sound waves in air?

Polarization A
Diffraction B
Refraction C
Reflection D

Question # 15

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

Wave number A
Frequency B
Wavelength C
Time period D

Question # 16

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 # 17

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

mass A
length B
material C
all of them D

Question # 18

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 # 19

A wave, which transfer energy by moving away from the source of disturbance is called a

progressive wave A
travelling wave B
both of them C
none of them D

Question # 20

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 # 21

Two sources of sound are said to be coherent if

The produce sounds of equal intensity A
They produce sounds of equal frequency B
They produce sound waves vibrating with the same phase C
They produce sound waves with zero or constant phase difference all instant of time D

Question # 22

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 # 23

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 # 24

Which one of the following could be the frequency of ultraviolet radiation?

1.0 x 10⁶Hz A
1.0 x 10⁹Hz B
1.0 x 10¹²Hz C
1.0 x 10¹⁵Hz D

Question # 25

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 # 26

The vibrations of factory floor caused by the running of heavy machinery is an example of

free vibration A
natural vibrations B
forced vibrations C
all of them D

Question # 27

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 # 28

Which of the following is an example of a S.H.M?

motion of a projectile A
motion of a train along a circular path B
motion of swing C
electrons revolving sound the nucleus D

Question # 29

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 # 30

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

Sr.#	Question	Answer
1	In a resonance situation the amplitude of the motion may become extra ordinarily large, if	A. the driving force is large B. the driving force is zero C. the driving force may be feeble D. all of them
2	The waves produced in a microwave oven have wavelength.	A. 12 mm B. 12 cm C. 12 m D. 12 mm
3	Which of the following is not mechanical wave?	A. Sound wave B. Light wave C. wave produced in spring D. None of them
4	Smaller the damping, greater will be the	A. frequency B. wavelength C. amplitude D. none of them
5	transverse wave motion is possible in:	A. Air B. A mixture of NH₃and O₂ C. Strings D. All of these
6	When a body is pulled away from its rest or equilibrium position and then released, the body oscillates due to	A. applied force B. momentum C. restoring force D. none of them
7	If the time period a simple pendulum is 2 s, its frequency would be	A. 2 Hz B. 1.5 Hz C. 1.0 Hz D. 0.5 Hz
8	A simple pendulum consists of a	A. small light bob B. small heavy bob C. big light bob D. big heavy bob
9	Fluids can transmit:	A. Transverse wave B. Compressional wave C. Both of them D. None of them
10	In transverse waves, the individual particles of the medium move:	A. In circles B. Perpendicular to the direction of level C. Parallel to the direction of level D. None of these

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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

In a resonance situation the amplitude of the motion may become extra ordinarily large, if

What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?

In case of mechanical waves, we study the motion of

The damping depends upon the

It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be

A physical system under going forced vibrations is known as

A traveling wave has a shape of:

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

The waves in which the particles of the medium have displacement along the direction of propagation of waves are called

If the time period a simple pendulum is 2 s, its frequency would be

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

The frequency of free vibrations is known as

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

Which one is not produced by sound waves in air?

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

For a body executing S. H. M, its

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

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

A wave, which transfer energy by moving away from the source of disturbance is called a

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

Two sources of sound are said to be coherent if

Which one of the following wave motions is transverse:

For production of beats the two sources must have

Which one of the following could be the frequency of ultraviolet radiation?

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

The vibrations of factory floor caused by the running of heavy machinery is an example of

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

Which of the following is an example of a S.H.M?

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

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

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