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

Question # 1

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 # 2

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 # 3

The time required to complete on vibration is called

frequency A
total time B
time period C
velocity D

Question # 4

The wave form of S.H.M will be

square wave A
sine wave B
rectified wave C
saw-tooth wave D

Question # 5

Acceleration of the mass at any instant is given by

a=k/m x A
a= - m/k x B
a = - k/m x C
a=m/k x D

Question # 6

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 # 7

Which of the following does not exhibit S.H.M?

a plucked violin string A
a mass attached to a spring B
a train shunting between two terminals C
a simple pendulum D

Question # 8

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 # 9

If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get

diffraction A
beat B
interference C
resonance 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

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 # 12

If the displacement of a body executing S.H.M is plotted against time, then the curve is known as

frequency of S.H.M A
period of S.H.M B
wave form C
none of them D

Question # 13

Sound waves in air always

Longitudinal A
Transverse B
Stationary C
Electromagnetic D

Question # 14

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 # 15

SI unit of wave length is:

Kilometer A
Metre B
Centimetre C
Hertz D

Question # 16

For transmission of both transverse and longitudinal waves, we can use:

Solid A
Gas B
Plasma C
None of these D

Question # 17

Which of the following is the longitudinal waves?

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

Question # 18

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 # 19

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 # 20

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 # 21

Time period of simple pendulum is independent of

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

Question # 22

Fluids can transmit:

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

Question # 23

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 # 24

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 # 25

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 # 26

Waves transport energy

without transport energy A
with matter B
both of them C
none of them D

Question # 27

In the same medium, velocity of the wave:

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

Question # 28

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 # 29

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 # 30

Which waves are used in sonography?

Microwaves A
Infra red waved B
Sound waves C
Ultrasonic waves D

Sr.#	Question	Answer
1	Which one of the following wave motions is transverse:	A. Wave motion produced in water when a piece of stone is thrown into it B. Pulling of weight hanging vertically with a spiral spring C. Both of these D. None of these
2	What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?	A. 1 MHz B. 10 Hz C. 1 GHz D. 100000 Hz
3	For a body executing S. H. M, its	A. momentum remains constant B. potential energy remains constant C. kinetic energy remains constant D. total energy remains constant
4	Shock absorber of the car is an example of	A. resonance B. forced oscillations C. interference D. damped oscillations
5	The distance covered by the wave during one period is called its:	A. Wave number B. Frequency C. Wavelength D. Time period
6	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
7	In case of mechanical waves, we study the motion of	A. a single particle B. collection of particle C. any one of them D. none of them
8	Sound waves in air always	A. Longitudinal B. Transverse C. Stationary D. Electromagnetic
9	Longitudinal waves are also called:	A. Congressional waves B. Transverse waves C. Radio waves D. None of them
10	Smaller the damping, the resonance will be	A. more flat B. more sharp C. both of them 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