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

Question # 1

Waves transport energy

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

Question # 2

The restoring force always directed towards the

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

Question # 3

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 # 4

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 # 5

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 # 6

Transverse waves can be set up:

Solids A
Liquids B
Gases C
All of them D

Question # 7

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 # 8

The wave form of S.H.M will be

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

Question # 9

The phase determines the

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

Question # 10

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 # 11

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 # 12

A weakly damped system has fairly

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

Question # 13

A traveling wave has a shape of:

Square wave A
Sine wave B
Parabola C
hyperbola D

Question # 14

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

Question # 15

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 # 16

If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are:

Stationary waves A
Transverse waves B
Both of these C
None of these D

Question # 17

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 # 18

If the length of a simple pendulum is 0.25 m its time period would be

1.0 s A
2.0 s B
3.0 s C
4.0 s D

Question # 19

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

Wave number A
Frequency B
Wavelength C
Time period D

Question # 20

If a simple pendulum is shifted from karachi to K-2 cliff, its time period

remains the same A
decreases B
increases C
none of them D

Question # 21

The speed of sound in a medium depends on

The elastic property but not on the inertia property A
The inertia property but not on the elastic property B
The elastic property as well as the inertia property C
Neither the elastic property nor the inertia property D

Question # 22

In the same medium, velocity of the wave:

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

Question # 23

A second's pendulum is a pendulum whose time period is

1 second A
2 seconds B
3 seconds C
4 seconds D

Question # 24

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 # 25

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 # 26

transverse wave motion is possible in:

Air A
A mixture of NH₃and O₂ B
Strings C
All of these D

Question # 27

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 # 28

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

mass A
length B
material C
all of them D

Question # 29

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

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

Question # 30

The time period of pendulums of different lengths would be

same A
different B
both of them C
none of them D

Sr.#	Question	Answer
1	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
2	A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is	A. 2 m B. 1 m C. 0.5 m D. 4 m
3	The square of 0.4 is:	A. Greater than 0.4 B. Smaller than 0.4 C. Equal to 0.4 D. None of them
4	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
5	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
6	The waves which propagate through the oscillations of material particles are known as:	A. Mechanical waves B. Electromagnetic waves C. Any of them D. None of them
7	When two progressive waves of nearly same frequencies superimpose and give rise to beats, then	A. Frequency of beat changes with time B. Frequency of beat changes with location of observer C. All particles of medium vibrate simple harmonically with frequency equal to the difference between frequencies of component waves D. Amplitude of vibration of particles at any point changes simple harmonically with frequency equal to difference between two component waves
8	Longitudinal waves are also called:	A. Congressional waves B. Transverse waves C. Radio waves D. None of them
9	The distance covered by the wave during one period is called its:	A. Wave number B. Frequency C. Wavelength D. Time period
10	At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is	A. Sinusoidal shape with amplitude A/3 B. Sinusoidal shape with amplitude A/2 C. Sinusoidal shape with amplitude A D. Straight line

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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