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Online Tests
Physics Fsc Part 1 Online Test MCQs With Answers
Question # 1
The speed of sound is greater in solids due to their high.
Choose an answer
Density
Pressure
Temperature
Elasticity
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Question # 2
A typical diffraction grating has certain number of lines per centimeter whose range is.
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40 to 50
400 to 5000
400 to 500
4000 to 5000
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Question # 3
Speed of sound in aluminum at 20
o
C is.
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3600 m/s
5100 m/s
5130 m/s
3500 m/s
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Question # 4
Boltzman constant 'k' has same unit as.
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Temperature
Energy
Entropy
Pressure
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Question # 5
The speed of sound in ari at 0
o
C is 332 ms-1, Then the speed at 40
o
C will be
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372 ms-1
356 ms-1
346 ms-1
332 ms-1
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Question # 6
The amplitude of a vibrating body at resonance in vacuum is
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Minimum
Maximum
Zero
Infinite
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Question # 7
Sound waves can not be
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Reflected
Refracted
Polarized
Diffracted
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Question # 8
The temperature scale which is independent of nature of substance is.
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Thermodynamic scale
Centigrade scale
Fahrenheit scale
Regnault scale
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Question # 9
If 30 waves per second pass through a medium at a speed 30 ms-1, then the wavelength is.
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30 m
15 m
1 m
28 m
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Question # 10
In order to produce beats, the two sound waves should have.
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The same amplitude
Slightly different amplitude
The same frequency
slightly different frequencies.
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Question # 11
For a rocket , the change in momentum per second of the ejecting gases is equal.
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Acceleration of the rocket
Momentum of rocket
Velocity of rocket
Thrust acting on rocket
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Question # 12
The phenomenon of polarization of light reveals that sun light is
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Longitudinal waves
Transverse wave
Electromagnetic waves
Monochromatic wave
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Question # 13
The speed of sound in air does not depend upon
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Temperature
Pressure
Density
Medium
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Question # 14
The K.E. of bullet of mass 500 gm moving at a speed of 200 ms-1
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250 J
125 J
2500 J
10,000 J
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Question # 15
In reversible process the entropy of system.
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Remain constant
Decrease
Increase
Becomes zero
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Question # 16
Name the quantity which is a vector.
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Speed
Force
Temperature
Density
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Question # 17
Biomas is a potential source of
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Renewable energy
Non renewable energy
Botha a and b
Tidal energy
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Question # 18
If a vector of magnitude 10 N along y-axis then its component along x-axis is
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0 N
5 N
8.66 N
10 N
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Question # 19
Sodium chloride in a flame gives
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Green light
White light
Red light
Yellow light
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Question # 20
In simple harmonic motion the velocity of a particle is maximum at.
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Extreme position
Mean position
In between extreme and mean position
None of them
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Question # 21
The process of confining the beam of light to vibrate in one plane is called.
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Interference
Diffraction
Polarization
Total internal refraction
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Question # 22
The work done will be maximum when angle between F and d.
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180
o
0
o
90
o
60
o
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