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

SI unit of frequency is

Question # 2

The waves produced in a microwave oven have wavelength.

Question # 3

For a body executing S. H. M, its

Question # 4

Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as

Question # 5

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

Question # 6

Longitudinal waves are also called:

Question # 7

The expression of Hook's law is

Question # 8

The phase determines the

Question # 9

The characteristic of a body executing S.H.M is that its acceleration is

Question # 10

Example of progressive wave is

Question # 11

The bob of a simple pendulum is suspended by

Question # 12

Acceleration of the mass at any instant is given by

Question # 13

When a mass 'm' is pulled slowly, the spring stretches by an amount x0,then the average force would be

Question # 14

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

Question # 15

Angular frequency 'w' is basically a characteristics of

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The frequency of free vibrations is known as
A. free frequency
B. forced frequency
C. natural frequency
D. un-natural frequency
2 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
3 If the length of second pendulum becomes four times then its time period will become
A. Four time
B. Two times
C. Six times
D. Eight times
4 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
5 The time required to complete on vibration is called
A. frequency
B. total time
C. time period
D. velocity
6 The principle of superposition states that
A. The total displacement due to several waves is the sum of the displacement due to those waves acting individually
B. Two stationary waves superimpose to give two progressive waves
C. A diffraction pattern consists of many interference patterns superimposed on one another
D. Two progressive waves superimpose to give a stationary wave
7 When two progressive waves of nearly same frequencies superimpose and give rise to beats, then
A. Frequency of beat changes with time
B. Frequency of beat changes with location of observer
C. All particles of medium vibrate simple harmonically with frequency equal to the difference between frequencies of component waves
D. Amplitude of vibration of particles at any point changes simple harmonically with frequency equal to difference between two component waves
8 If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get
A. diffraction
B. beat
C. interference
D. resonance
9 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
10 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

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