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

If we increase the length of a simple pendulum four times, its time period will become

Question # 2

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is

Question # 3

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

Question # 4

For a body executing S. H. M, its

Question # 5

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

Question # 6

Example of vibratory motion is

Question # 7

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

Question # 8

The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as

Question # 9

Data transmitted along glass-fiber cables is in the form of pulses of monochromatic red light each of duration 2.5 ns. Which of the following is the best estimate of the number of wavelength in each pulse?

Question # 10

When the bob of simple pendulum is at extreme position, its K.E. will be

Question # 11

The waves in which the particles of the medium have displacement along the direction of propagation of waves are called

Question # 12

When two progressive waves of nearly same frequencies superimpose and give rise to beats, then

Question # 13

Angular frequency 'w' is basically a characteristics of

Question # 14

The waves which propagate through the oscillations of material particles are known as:

Question # 15

Laplace formula is derived from

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The waves produced in a microwave oven have frequency
A. 2450 Hz
B. 2450 K Hz
C. 2450 M Hz
D. 2450 G Hz
2 Which one of the following elasticizes is possessed by fluids:
A. Young's elastic modulus (length)
B. Bulk elastic modulus (volume)
C. Modulus of rigidity (shape)
D. None of these
3 If a freely oscillating system is subjected to an external force, then
A. free vibrations will take place
B. the body will move with its natural frequency
C. forced vibrations will take place
D. none of them
4 The time required to complete on vibration is called
A. frequency
B. total time
C. time period
D. velocity
5 Which waves are used in sonography?
A. Microwaves
B. Infra red waved
C. Sound waves
D. Ultrasonic waves
6 Example of vibratory motion is
A. mass suspended from a spring
B. a bob of simple pendulum
C. mass attached to a spring placed
D. all of them
7 The square of 0.4 is:
A. Greater than 0.4
B. Smaller than 0.4
C. Equal to 0.4
D. None of them
8 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
9 At 'resonance' the transfer of energy from deriving source to the oscillator is
A. maximum
B. minimum
C. zero
D. none of them
10 A simple pendulum consists of a
A. small light bob
B. small heavy bob
C. big light bob
D. big heavy bob

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