ECAT Pre Engineering Physics Chapter 8 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 8 Waves

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Physics ECAT Pre Engineering Chapter 8 Waves

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Question # 1

When temperature increase, the frequency of a tuning fork

Question # 2

The portion of the water above its mean level forms a:

Question # 3

Sound waves in air always

Question # 4

A weakly damped system has fairly

Question # 5

The velocity of sound is greatest in

Question # 6

The distance covered by the wave in one second is:

Question # 7

The time period of pendulums of different lengths would be

Question # 8

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

Question # 9

In case of mechanical waves, we study the motion of

Question # 10

Mechanical waves on the surface of a liquid are

Question # 11

The restoring force always directed towards the

Question # 12

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

Question # 13

For a body executing S. H. M, its

Question # 14

When a body moves to and fro motion, this type of motion is called

Question # 15

The temperature at which the speed of sound becomes double as was at 27°C is

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:
A. Longitudinal waves
B. Transverse waves
C. Water waves
D. Complex waves
2 SI unit of frequency is
A. second
B. hertz
C. revolution
D. vibrations/sec
3 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
4 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
5 If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be
A. Increasing by a factor of 2
B. Decreasing by a factor of 2
C. Decreasing by a factor of 4
D. Unchanged
6 Transverse waves can be set up:
A. Solids
B. Liquids
C. Gases
D. All of them
7 Laplace formula is derived from
A. Isothermal change
B. Adiabatic change
C. Isobaric change
D. None of these
8 The waves produced in a microwave oven have frequency
A. 2450 Hz
B. 2450 K Hz
C. 2450 M Hz
D. 2450 G Hz
9 The vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called
A. rotatory motion
B. motion under gravity
C. angular motion
D. simple harmonic motion
10 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

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