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

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

Question # 2

The waves which propagate by the collision of material particles are known as

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Shock absorber of the car is an example of

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

Question # 11

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

Question # 12

In the same medium, velocity of the wave:

Question # 13

The wave form of S.H.M will be

Question # 14

For production of beats the two sources must have

Question # 15

Example of vibratory motion is

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be
A. 45°
B. 90°
C. 135°
D. 180°
2 Fluids can transmit:
A. Transverse wave
B. Compressional wave
C. Both of them
D. None of them
3 In solids, only following type/s of wave can travel:
A. Transverse
B. Longitudinal
C. Both A and B
D. None of them
4 An object undergoes S.H.M has maximum speed when its displacement from the mean position is
A. maximum
B. zero
C. half of the maximum value
D. one third of the maximum value
5 The instantaneous velocity of a body moving along a circle is directed
A. along the radius
B. along the tangent
C. away from the circle
D. none of them
6 The frequency of free vibrations is known as
A. free frequency
B. forced frequency
C. natural frequency
D. un-natural frequency
7 With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are
A. Energy, momentum and mass
B. Energy
C. Energy and mass
D. Energy and linear momentum
8 SI unit of wave length is:
A. Kilometer
B. Metre
C. Centimetre
D. Hertz
9 While describing the motion of a simple pendulum, the frictional effects are
A. taken into account
B. completely ignored
C. partially ignored
D. none of them
10 Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of
A. very small energy
B. very large energy
C. frictional forces
D. acceleration due to gravity

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