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

Question # 2

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 # 3

Fidelity refers to

Question # 4

At 'resonance' the transfer of energy from deriving source to the oscillator is

Question # 5

The bob of a simple pendulum is suspended by

Question # 6

In a resonance situation the amplitude of the motion may become extra ordinarily large, if

Question # 7

transverse wave motion is possible in:

Question # 8

The waves produced in a microwave oven have wavelength.

Question # 9

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

Question # 10

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

Question # 11

The velocity of sound is greatest in

Question # 12

In the formula for finding the speed of waves in the spring, unit of m in SIn units is:

Question # 13

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

Question # 14

Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator

Question # 15

A heavily damped system has a fairly

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is
A. 2 m
B. 1 m
C. 0.5 m
D. 4 m
2 When a mass 'm' is pulled slowly, the spring stretches by an amount xo, then the work done will be
A. W=Kxo
B. W=1/2Kxo
C. W=1/2Kx2o
D. W=4Kxo
3 The wave form of S.H.M will be
A. square wave
B. sine wave
C. rectified wave
D. saw-tooth wave
4 When a wave is travels from one place to another, it transfers:
A. Matter
B. Energy
C. Momentum
D. Both B and C
5 When a body is performing S.H.M., its acceleration is
A. inversely proportional to the displacement
B. directly proportional to the applied force
C. directly proportional to the amplitude
D. directly proportional to the displacement but in opposite direction
6 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
7 A swing has
A. one natural frequency
B. two natural frequencies
C. three natural frequencies
D. four natural frequencies
8 Which of the following is the longitudinal waves?
A. Sound waves
B. Waves on plucked string
C. Water waves
D. Light waves
9 To hear a clear echo, the reflecting surface must be at a minimum distance of
A. 10 m
B. 16.5 m
C. 33 m
D. 66 m
10 The restoring force always directed towards the
A. extreme position
B. mean position
C. both of them
D. none of them

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