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NAT II Physical Science Physics MCQs With Answers
Question # 1
The initial velocity of a body moving along a straight line in 7 m/s. It has a uniform acceleration of 4 m/s
2
. The distance covered by the body in the 5th second of its motion is
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25 m
35 m
50 m
85 m
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Question # 2
A wire is stretched to double of its length. The strain is
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2
1
zero
0.5
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Question # 3
As the electron in Bohr orbit of hydrogen atom passes from stat n = 2 to n = 1, the kinetic energy K and potential energy U change as
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K two fold, U also two fold
K four fold, U also four fold
K four fold, U two fold
K two fold, U four fold
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Question # 4
The motion without consideration of its cause is studied in
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Kinematics
Mechanics
Statics
Modern Physics
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Question # 5
A wire of radius r has resistance R, It it is stretched to a wire of r/2 radius, then the resistance becomes
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2R
4R
16R
Zero
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Question # 6
If the dot product of two non-zero vectors vanishes, the vectors will be
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In the same direction
Opposite to each other
Perpendicular to each other
Zero
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Question # 7
When the length of a microscope tube increases, its magnifying power
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Decreases
Increases
May increases or decreases depending on the observer and the place of observation
Does not change
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Question # 8
Planck's constant has the dimensions of:
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Energy
Momentum
Frequency
Angular momentum
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Question # 9
When boron is added as an impurity to silicon, the resulting material is.
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n type conductor
n type semiconductor
p-type conductor
p-type semiconductor
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Question # 10
A person standing near the track of a fast moving train has tendency to fall towards it because of
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Vibration due to motion of train
Gravitation force of attraction between person and trains
The high speed of train
Some other effect
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Question # 11
Who explained the origin of the Fraunhoffer lines?
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Fraunhoffer
Kirchhoff
Fresnel
Snell
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Question # 12
Copper and germanium are cooled to 70K from room temperature, then
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Resistance of copper increases while that of germanium decreases
Resistance of copper decreases while that of germanium increases
Resistance of both decreases
Resistance of both increases
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Question # 13
Light appears to travel in straight lines since
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It is not absorbed by the atmosphere
It is reflected by the atmosphere
Its wavelength is very small
Its velocity is very large
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Question # 14
A body moving in circular motion with constant speed has
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Constant velocity
Constant acceleration
Constant kinetic energy
Constant displacement
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Question # 15
The length of a telescope is 36 cm. The focal lengths of its lenses can be
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30 cm, 6 cm
-30 cm, -6 cm
30 cm, -6cm
-30cm, 6cm
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Question # 16
There are discrete energy levels in atoms. It was first experimentally demonstrated by
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Rutherford's experiment
Franck Hertz experiment
Marsden's experiment
Somerfield experiment
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