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

Example of progressive wave is

Question # 2

Laplace formula is derived from

Question # 3

In the same medium, velocity of the wave:

Question # 4

The instantaneous velocity of a body moving along a circle is directed

Question # 5

The vibratory or oscillatory motion of a body is

Question # 6

For a body executing S. H. M, its

Question # 7

SI unit of frequency is

Question # 8

The vibrations of factory floor caused by the running of heavy machinery is an example of

Question # 9

Velocity of sound in vacuum (in m/s) is

Question # 10

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 # 11

Which one of the following wave motions is transverse:

Question # 12

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

Question # 13

The time required to complete on vibration is called

Question # 14

The phase determines the

Question # 15

The distance covered by the wave in one second is:

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 When sound waves travel from air to water which of these remains constant?
A. Velocity
B. Frequency
C. Wavelength
D. All the above
2 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
3 Sound waves in air always
A. Longitudinal
B. Transverse
C. Stationary
D. Electromagnetic
4 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
5 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
6 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°
7 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
8 The speed of sound in a medium depends on
A. The elastic property but not on the inertia property
B. The inertia property but not on the elastic property
C. The elastic property as well as the inertia property
D. Neither the elastic property nor the inertia property
9 Which one is not produced by sound waves in air?
A. Polarization
B. Diffraction
C. Refraction
D. Reflection
10 Smaller the damping, greater will be the
A. frequency
B. wavelength
C. amplitude
D. none of them

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