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 the mass of the simple pendulum becomes double, its time period

Question # 2

When a body moves to and fro motion, this type of motion is called

Question # 3

If a wave can be polarized, it must be

Question # 4

The velocity of sound in air depends upon

Question # 5

The restoring force always directed towards the

Question # 6

Which waves are used in sonography?

Question # 7

Shock absorber of the car is an example of

Question # 8

If the length of a simple pendulum is 0.25 m its time period would be

Question # 9

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

Question # 10

It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be

Question # 11

Which of the following is/are example/s if mechanical waves i.e. waves generated in _______:

Question # 12

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

Question # 13

Longitudinal waves are also called:

Question # 14

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

Question # 15

The time required to complete on vibration is called

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 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
2 The expression of Hook's law is
A. F=ma
B. F=kx
C. F= -kx
D. -kx=ma
3 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
4 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
5 The phase determines the
A. displacement
B. amplitude
C. frequency
D. state of motion of vibrating body
6 The total energy of spring mass system is
A. zero
B. changing with time
C. constant
D. none of them
7 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
8 There is no net transfer of energy by particle of medium in
A. Longitudinal wave
B. Transverse wave
C. Progressive wave
D. Stationary wave
9 When a wave is travels from one place to another, it transfers:
A. Matter
B. Energy
C. Momentum
D. Both B and C
10 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

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