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

Question # 2

What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?

Question # 3

The vibratory or oscillatory motion of a body is

Question # 4

Sound waves in air always

Question # 5

The velocity of sound in air not effected by changes in

Question # 6

Fidelity refers to

Question # 7

Example of vibratory motion is

Question # 8

If a freely oscillating system is subjected to an external force, then

Question # 9

Si units of time period is

Question # 10

A body is executing free vibrations when it oscilates

Question # 11

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?

Question # 12

The expression of Hook's law is

Question # 13

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

Question # 14

Shock absorber of the car is an example of

Question # 15

Ultra-violet rays differ from X-rays in that they

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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 In the formula for finding the speed of waves in the spring, unit of m in SIn units is:
A. kg
B. kg-meter
C. kg/meter
D. Meter/kg
3 Which of the following is an example of a S.H.M?
A. motion of a projectile
B. motion of a train along a circular path
C. motion of swing
D. electrons revolving sound the nucleus
4 The frequency of free vibrations is known as
A. free frequency
B. forced frequency
C. natural frequency
D. un-natural frequency
5 For a body executing S. H. M, its
A. momentum remains constant
B. potential energy remains constant
C. kinetic energy remains constant
D. total energy remains constant
6 If the displacement of a body executing S.H.M is plotted against time, then the curve is known as
A. frequency of S.H.M
B. period of S.H.M
C. wave form
D. none of them
7 Ultra-violet rays differ from X-rays in that they
A. Cannot be diffracted
B. Cannot be polarized
C. Have a lower frequency
D. Are deviated when they pass through a magnetic field
8 The waves which propagate out in the space due to oscillations of electric and magnetic fields are called:
A. Mechanical waves
B. Electromagnetic waves
C. Matter waves
D. All of them
9 Example of progressive wave is
A. transverse waves
B. longitudinal waves
C. both of them
D. none of them
10 The force which opposes the applied force producing the displacement in the spring is called
A. restoring force
B. periodic force
C. centripetal force
D. resistive force

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