ECAT Pre Engineering Physics Chapter 8 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 8 Waves

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 8 Waves

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Physics ECAT Pre Engineering Chapter 8 Waves

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Question # 1

An object undergoes S.H.M has maximum acceleration when its displacement form the means position

Question # 2

Crests and troughs are formed in:

Question # 3

The natural frequency of a pendulum which is vibrating freely, depends upon its

Question # 4

Which waves are used in sonography?

Question # 5

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 # 6

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

Question # 7

When a mass 'm' is pulled slowly through a distance 'xo' , the elastic potential energy of the spring would be

Question # 8

Decibel is unit of

Question # 9

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

Question # 10

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

Question # 11

In the production of beats by 2 waves of same amplitude and nearly same frequency, the maximum intensity to each of the constituent waves is

Question # 12

Which of the following is an example of a S.H.M?

Question # 13

The time required to complete on vibration is called

Question # 14

If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get

Question # 15

While describing the motion of a simple pendulum, the frictional effects are

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The loudness and pitch of a sound note depends on
A. Intensity and velocity
B. Frequency and velocity
C. Intensity and frequency
D. Frequency and number of harmonic
2 A heavily damped system has a fairly
A. sharp resonance curve
B. flat resonance curve
C. both of them
D. none of them
3 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
4 The velocity of sound is greatest in
A. Water
B. Air
C. Vacuum
D. Metal
5 Velocity of sound in vacuum (in m/s) is
A. 330
B. 1000
C. 156
D. 0
6 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
7 If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be
A. Increasing by a factor of 2
B. Decreasing by a factor of 2
C. Decreasing by a factor of 4
D. Unchanged
8 The bob of a simple pendulum is suspended by
A. string
B. heavy inextensible string
C. light extensible string
D. light inextensible string
9 The waves produced in a microwave oven have frequency
A. 2450 Hz
B. 2450 K Hz
C. 2450 M Hz
D. 2450 G Hz
10 The expression for restoring force is
A. F=ma
B. F=kx
C. F= -kx
D. Kx=ma

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