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

Such oscillations in which the amplitude decreases steadily with time, are called

Question # 2

The damping depends upon the

Question # 3

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

Question # 4

The restoring force always directed towards the

Question # 5

Longitudinal waves are also called:

Question # 6

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

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

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 # 9

A heavily damped system has a fairly

Question # 10

In stationary waves

Question # 11

While describing the motion of a simple pendulum, the frictional effects are

Question # 12

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

Question # 13

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

Question # 14

The bob of a simple pendulum is suspended by

Question # 15

The velocity of sound in air not effected by changes in

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 In solids, only following type/s of wave can travel:
A. Transverse
B. Longitudinal
C. Both A and B
D. None of them
2 The velocity of sound is greatest in
A. Water
B. Air
C. Vacuum
D. Metal
3 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°
4 The waves moving from a sitar to a listener in air are
A. Longitudinal progressive
B. Longitudinal stationary
C. Transverse progressive
D. Transverse stationary
5 Progressive waves of frequency 300 Hz are superimposed in produced a system of stationary waves in which adjacent nodes are 1.5 m apart. What is the speed of the progressive waves?
A. 100 ms-1
B. 200 ms-1
C. 450 ms-1
D. 900 ms-1
6 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
7 If the length of a simple pendulum is 0.25 m its time period would be
A. 1.0 s
B. 2.0 s
C. 3.0 s
D. 4.0 s
8 The velocity of sound in air depends upon
A. Density and elasticity of gas
B. Pressure
C. Wavelength
D. Amplitude and frequency of sound
9 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
10 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°

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