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

Decibel is unit of

Question # 2

Acceleration of the mass at any instant is given by

Question # 3

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 # 4

A wave, which transfer energy by moving away from the source of disturbance is called a

Question # 5

The expression of Hook's law is

Question # 6

The instantaneous velocity of a body moving along a circle is directed

Question # 7

The waves in which the particles of the medium have displacement along the direction of propagation of waves are called

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

If we increase the length of a simple pendulum four times, its time period will become

Question # 12

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

Question # 13

A physical system under going forced vibrations is known as

Question # 14

Time period of a simple pendulum depends upon the

Question # 15

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

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Ultra-violet rays differ from X-rays in that they
A. Cannot be diffracted
B. Cannot be polarized
C. Have a lower frequency
D. Are deviated when they pass through a magnetic field
2 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
3 Transverse waves can be set up:
A. Solids
B. Liquids
C. Gases
D. All of them
4 Si units of time period is
A. second
B. hertz
C. revolution
D. vibration/sec
5 The velocity of sound at same temperature is maximum in
A. H2
B. N2
C. O2
D. NH3
6 Which of the following is/are example/s if mechanical waves i.e. waves generated in _______:
A. Rope
B. Coil of spring
C. Water
D. All of them
7 Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as
A. waves
B. beat
C. interference
D. resonance
8 The wave motion set up in any medium depends upon:
A. Elasticity
B. Inertia
C. Density
D. All of these
9 At 'resonance' the transfer of energy from deriving source to the oscillator is
A. maximum
B. minimum
C. zero
D. none of them
10 While describing the motion of a simple pendulum, the frictional effects are
A. taken into account
B. completely ignored
C. partially ignored
D. none of them

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