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 time required to complete on vibration is called

Question # 2

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

Question # 3

Such oscillations in which the amplitude decreases steadily with time, are called

Question # 4

The weight 'mg' of the bob is resolved into

Question # 5

Which of the following changes at an antinode in a stationary wave?

Question # 6

The phase determines the

Question # 7

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

Question # 8

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

Question # 9

Which of the following is not mechanical wave?

Question # 10

As the bob of the pendulum moves to and fro which of the force is experienced by the bob

Question # 11

The waves which propagate out in the space due to oscillations of electric and magnetic fields are called:

Question # 12

Which waves are used in sonography?

Question # 13

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

Question # 14

If F=0.04 N and X=4 cm then K=

Question # 15

The speed of sound in a medium depends on

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Crests and troughs are formed in:
A. Longitudinal waves
B. Transverse waves
C. Both of these
D. None of these
2 If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get
A. diffraction
B. beat
C. interference
D. resonance
3 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
4 Which of the following changes at an antinode in a stationary wave?
A. Density only
B. Pressure only
C. Both pressure and density
D. Neither pressure nor density
5 The velocity of sound is greatest in
A. Water
B. Air
C. Vacuum
D. Metal
6 Of the following, the option ______ reminds of longitudinal waves.
A. Sound waves
B. Heat waves
C. Electromagnetic waves
D. Light waves
7 Sound waves in air always
A. Longitudinal
B. Transverse
C. Stationary
D. Electromagnetic
8 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
9 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
10 The waves moving from a sitar to a listener in air are
A. Longitudinal progressive
B. Longitudinal stationary
C. Transverse progressive
D. Transverse stationary

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