ECAT Pre Computer Science Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 8 Waves

Try The MCQ's Test For ECAT Physics Chapter 8 Waves

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ECAT Physics Chapter 8 Waves

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Question # 1

The velocity of sound in air depends upon

Question # 2

Which of the following changes at an antinode in a stationary wave?

Question # 3

Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at

Question # 4

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

Question # 5

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:

Question # 6

Time period of a simple pendulum depends upon the

Question # 7

The expression of Hook's law is

Question # 8

In case of mechanical waves, we study the motion of

Question # 9

In the formula for finding the speed of waves in the spring, unit of m in SIn units is:

Question # 10

The restoring force always directed towards the

Question # 11

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

Question # 12

The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

Question # 13

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

Question # 14

Waves transport energy

Question # 15

In stationary waves

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 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
2 Through which character we can distinguish the light waves from sound waves
A. Interference
B. Refraction
C. Polarization
D. Reflection
3 The waves which propagate by the collision of material particles are known as
A. e.m. waves
B. mechanical waves
C. light waves
D. microwaves
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 The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be
A. 1 : 2
B. 4 : 1
C. 1 : 4
D. 2 : 1
6 The wave form of S.H.M will be
A. square wave
B. sine wave
C. rectified wave
D. saw-tooth wave
7 The waves produced in a microwave oven have wavelength.
A. 12 mm
B. 12 cm
C. 12 m
D. 12 mm
8 When a mass 'm' is pulled slowly through a distance 'xo' , the elastic potential energy of the spring would be
A. P.E=Kx2o
B. P.E= 1/2kxo
C. P.E=1/2Kx2o
D. P.E=Kx2o
9 The resonance will be sharp, if the amplitude decreases rapidly at a frequency
A. equal to the resonant frequency
B. slight different from the resonant frequency
C. greatly different from the resonant frequency
D. any one of them
10 If a simple pendulum is shifted from karachi to K-2 cliff, its time period
A. remains the same
B. decreases
C. increases
D. none of them

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