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

Question # 1

Laplace formula is derived from

Isothermal change A
Adiabatic change B
Isobaric change C
None of these 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

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

resonance A
force oscillations B
large oscillations C
damped oscillations D

Question # 4

The characteristic of a body executing S.H.M is that its acceleration is

inversely proportional to displacement A
directly proportional to displacement B
independent of displacement C
equal to zero D

Question # 5

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

mass A
length B
material C
all of them D

Question # 6

An object undergoes S.H.M has maximum speed when its displacement from the mean position is

maximum A
zero B
half of the maximum value C
one third of the maximum value D

Question # 7

When temperature increase, the frequency of a tuning fork

Increases A
Decreases B
Remains same C
Increase or decreases depending on the material D

Question # 8

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 # 9

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 # 10

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 # 11

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

Increasing by a factor of 2 A
Decreasing by a factor of 2 B
Decreasing by a factor of 4 C
Unchanged D

Question # 12

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 # 13

Angular frequency 'w' is basically a characteristics of

linear motion A
circular motion B
both of them C
none of them D

Question # 14

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 # 15

When a mass 'm' is pulled slowly, the spring stretches by an amount x_o, then the work done will be

W=Kx_o A
W=1/2Kx_o B
W=1/2Kx²_o C
W=4Kx_o D

Question # 16

The restoring force always directed towards the

extreme position A
mean position B
both of them C
none of them D

Question # 17

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 # 18

A simple pendulum consists of a

small light bob A
small heavy bob B
big light bob C
big heavy bob D

Question # 19

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

Solids A
Liquids B
Gases C
All of them D

Question # 20

A swing has

one natural frequency A
two natural frequencies B
three natural frequencies C
four natural frequencies D

Question # 21

The instantaneous velocity of a body moving along a circle is directed

along the radius A
along the tangent B
away from the circle C
none of them D

Question # 22

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 # 23

Fluids can transmit:

Transverse wave A
Compressional wave B
Both of them C
None of them D

Question # 24

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 # 25

Progressive waves of frequency 300 Hz are superimposed in produced a system of stationary waves in which adjacent nodes are 1.5 m apart. What is the speed of the progressive waves?

100 ms^-1 A
200 ms^-1 B
450 ms^-1 C
900 ms^-1 D

Question # 26

When sound waves travel from air to water which of these remains constant?

Velocity A
Frequency B
Wavelength C
All the above D

Question # 27

Si units of time period is

second A
hertz B
revolution C
vibration/sec D

Question # 28

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 # 29

The phase determines the

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

Question # 30

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

Sr.#	Question	Answer
1	The waves produced in a microwave oven have wavelength.	A. 12 mm B. 12 cm C. 12 m D. 12 mm
2	Which waves are used in sonography?	A. Microwaves B. Infra red waved C. Sound waves D. Ultrasonic waves
3	If the displacement of a body executing S.H.M is plotted against time, then the curve is known as	A. frequency of S.H.M B. period of S.H.M C. wave form D. none of them
4	In the same medium, velocity of the wave:	A. Goes on increasing B. Remains constant C. Goes on decreasing D. None of these
5	Smaller the damping, the resonance will be	A. more flat B. more sharp C. both of them D. none of them
6	The waves produced in a microwave oven have frequency	A. 2450 Hz B. 2450 K Hz C. 2450 M Hz D. 2450 G Hz
7	Time period of a simple pendulum depends upon the	A. length of the pendulum B. acceleration due to gravity C. none of them D. both of them
8	Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator	A. greater than the frequency of applied force B. equal to the frequency of applied force C. less than the frequency of applied force D. all of them
9	A simple pendulum consists of a	A. small light bob B. small heavy bob C. big light bob D. big heavy bob
10	The wave motion set up in any medium depends upon:	A. Elasticity B. Inertia C. Density D. All 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

Laplace formula is derived from

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

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

The characteristic of a body executing S.H.M is that its acceleration is

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

An object undergoes S.H.M has maximum speed when its displacement from the mean position is

When temperature increase, the frequency of a tuning fork

In transverse waves, the individual particles of the medium move:

Two sources of sound are said to be coherent if

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

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

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

Angular frequency 'w' is basically a characteristics of

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

When a mass 'm' is pulled slowly, the spring stretches by an amount xo, then the work done will be

The restoring force always directed towards the

A physical system under going forced vibrations is known as

A simple pendulum consists of a

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

A swing has

The instantaneous velocity of a body moving along a circle is directed

The square of 0.4 is:

Fluids can transmit:

The velocity of sound in air depends upon

Progressive waves of frequency 300 Hz are superimposed in produced a system of stationary waves in which adjacent nodes are 1.5 m apart. What is the speed of the progressive waves?

When sound waves travel from air to water which of these remains constant?

Si units of time period is

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

The phase determines the

The velocity of sound in air not effected by changes in

Prepare Complete Set Wise ECAT Pre General Science Physics Chapter 8 Waves MCQs Online With Answers

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Set 2

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When a mass 'm' is pulled slowly, the spring stretches by an amount x_o, then the work done will be