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

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

Question # 3

The vibratory or oscillatory motion of a body is

Question # 4

Smaller the damping, the resonance will be

Question # 5

The weight 'mg' of the bob is resolved into

Question # 6

The time required to complete on vibration is called

Question # 7

Sound waves in air always

Question # 8

The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

Question # 9

Which one of the following elasticizes is possessed by fluids:

Question # 10

The loudness and pitch of a sound note depends on

Question # 11

If F=0.04 N and X=4 cm then K=

Question # 12

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

Question # 13

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

Question # 14

The velocity of sound in air not effected by changes in

Question # 15

To hear a clear echo, the reflecting surface must be at a minimum distance of

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Angular frequency 'w' is basically a characteristics of
A. linear motion
B. circular motion
C. both of them
D. none of them
2 The waves which propagate out in space due to oscillation of electric and magnetic fields are known as
A. e.m. waves
B. mechanical waves
C. sound waves
D. water waves
3 transverse wave motion is possible in:
A. Air
B. A mixture of NH3and O2
C. Strings
D. All of these
4 A swing has
A. one natural frequency
B. two natural frequencies
C. three natural frequencies
D. four natural frequencies
5 The resonance will be sharp, if the amplitude decreases rapidly at a frequency
A. equal to the resonant frequency
B. slight different from the resonant frequency
C. greatly different from the resonant frequency
D. any one of them
6 Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?
A. 400 m/sec
B. 40 m/sec
C. 430 m/sec
D. 300 m/sec
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 The waves moving from a sitar to a listener in air are
A. Longitudinal progressive
B. Longitudinal stationary
C. Transverse progressive
D. Transverse stationary
9 When the bob of simple pendulum is at extreme position, its K.E. will be
A. maximum
B. minimum
C. zero
D. all of them
10 When temperature increase, the frequency of a tuning fork
A. Increases
B. Decreases
C. Remains same
D. Increase or decreases depending on the material

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