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

Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?

Question # 2

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

Question # 3

What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?

Question # 4

If a wave can be polarized, it must be

Question # 5

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

Question # 6

For transmission of both transverse and longitudinal waves, we can use:

Question # 7

The square of 0.4 is:

Question # 8

Which one of the following is an example of resonance

Question # 9

A physical system under going forced vibrations is known as

Question # 10

The waves produced in a microwave oven have wavelength.

Question # 11

The temperature at which the speed of sound becomes double as was at 27°C is

Question # 12

In transverse waves, the individual particles of the medium move:

Question # 13

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

Question # 14

When a body is pulled away from its rest or equilibrium position and then released, the body oscillates due to

Question # 15

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

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 If a wave can be polarized, it must be
A. An electromagnetic wave
B. A longitudinal wave
C. A progressive wave
D. A transverse wave
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 waves which propagate through the oscillations of material particles are known as:
A. Mechanical waves
B. Electromagnetic waves
C. Any of them
D. None of them
4 Two sources of sound are said to be coherent if
A. The produce sounds of equal intensity
B. They produce sounds of equal frequency
C. They produce sound waves vibrating with the same phase
D. They produce sound waves with zero or constant phase difference all instant of time
5 If a simple pendulum is shifted from karachi to K-2 cliff, its time period
A. remains the same
B. decreases
C. increases
D. none of them
6 At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is
A. Sinusoidal shape with amplitude A/3
B. Sinusoidal shape with amplitude A/2
C. Sinusoidal shape with amplitude A
D. Straight line
7 Example of progressive wave is
A. transverse waves
B. longitudinal waves
C. both of them
D. none of them
8 The velocity of sound in air not effected by changes in
A. Moisture contents in air
B. Temperature of air
C. The atmosphere pressure
D. The composition of air
9 The portion of the water above its mean level forms a:
A. Crest
B. Trough
C. Both A and B
D. None of these
10 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
A. Same
B. 2 times
C. 4 times
D. 8 times

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