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

The frequency of free vibrations is known as

Question # 2

Mechanical waves on the surface of a liquid are

Question # 3

A physical system under going forced vibrations is known as

Question # 4

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

Question # 5

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 # 6

An object undergoes S.H.M has maximum speed when its displacement from the mean position is

Question # 7

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

Question # 8

If the time period a simple pendulum is 2 s, its frequency would be

Question # 9

The force which opposes the applied force producing the displacement in the spring is called

Question # 10

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

Question # 11

Transverse waves can be set up:

Question # 12

The phase determines the

Question # 13

If the length of second pendulum becomes four times then its time period will become

Question # 14

If a simple pendulum is shifted from karachi to K-2 cliff, its time period

Question # 15

Laplace formula is derived from

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Such oscillations in which the amplitude decreases steadily with time, are called
A. resonance
B. force oscillations
C. large oscillations
D. damped oscillations
2 The force which opposes the applied force producing the displacement in the spring is called
A. restoring force
B. periodic force
C. centripetal force
D. resistive force
3 The total energy of spring mass system is
A. zero
B. changing with time
C. constant
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 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 If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are:
A. Stationary waves
B. Transverse waves
C. Both of these
D. None of these
7 In the same medium, velocity of the wave:
A. Goes on increasing
B. Remains constant
C. Goes on decreasing
D. None of these
8 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?
A. 103
B. 106
C. 109
D. 1012
9 If F=0.04 N and X=4 cm then K=
A. 1 Nm-1
B. 2 Nm-1
C. 3 Nm-1
D. 4 Nm-1
10 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

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