ECAT Pre General Science Physics Chapter 8 Waves

MCQ's Test For ECAT Pre General Science Physics Chapter 8 Waves

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ECAT Pre General Science Physics Chapter 8 Waves

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Question # 1

When a body is performing S.H.M., its acceleration is

Question # 2

If F=0.04 N and X=4 cm then K=

Question # 3

SI unit of frequency is

Question # 4

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

Question # 5

Which of the following is not mechanical wave?

Question # 6

The time period of pendulums of different lengths would be

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

Fidelity refers to

Question # 12

Transverse waves can be set up:

Question # 13

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

Question # 14

When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be

Question # 15

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

Question # 16

The wave form of S.H.M will be

Question # 17

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

Question # 18

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

Question # 19

There is no net transfer of energy by particle of medium in

Question # 20

The square of 0.4 is:

Question # 21

When temperature increase, the frequency of a tuning fork

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

Example of progressive wave is

Question # 27

In the same medium, velocity of the wave:

Question # 28

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

Question # 29

Shock absorber of the car is an example of

Question # 30

Which type of wave can be set up in solids

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ECAT Physics Chapter 8 Important MCQ's

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 It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be
A. 60°
B. 90°
C. 120°
D. 180°
3 A simple pendulum consists of a
A. small light bob
B. small heavy bob
C. big light bob
D. big heavy bob
4 The natural frequency of a pendulum which is vibrating freely, depends upon its
A. mass
B. length
C. material
D. all of them
5 When a mass 'm' is pulled slowly, the spring stretches by an amount x0,then the average force would be
A. F= Kx0
B. F=1/2Kx0
C. F=2Kx0
D. F=4Kx0
6 A physical system under going forced vibrations is known as
A. Simple harmonic oscillator
B. Compound harmonic oscillator
C. Physical harmonic oscillator
D. driven harmonic oscillator
7 In the formula for finding the speed of waves in the spring, unit of m in SIn units is:
A. kg
B. kg-meter
C. kg/meter
D. Meter/kg
8 If F=0.04 N and X=4 cm then K=
A. 1 Nm-1
B. 2 Nm-1
C. 3 Nm-1
D. 4 Nm-1
9 The waves in which the particles of the medium have displacement along the direction of propagation of waves are called
A. longitudinal waves
B. transverse waves
C. non-mechanical waves
D. none of them
10 The characteristic of a body executing S.H.M is that its acceleration is
A. inversely proportional to displacement
B. directly proportional to displacement
C. independent of displacement
D. equal to zero

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