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Physics General Science Test Medium Mode MCQs With Answers
Question # 1
The substances which break just after the elastic limit is reached, are known as
Choose an answer
brittle substances
ductile substances
plastic substances
elastic substances
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Question # 2
If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbine, is (Take g=9.8 m/s
2
)
Choose an answer
9.8 m/s
19.6 m/s
39.2 m/s
98.0 m/s
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Question # 3
The spectrum emitted from hydrogen filled discharge tube is:
Choose an answer
Line spectrum
Discrete spectrum
And spectrum
Absorption spectrum
Both (A) and (B)
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Question # 4
First law of thermodynamic is special case of
Choose an answer
Law of conservation of energy
Charle's law
Law of conservation of mass
Boyle's law
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Question # 5
Intensity of light determines the:
Choose an answer
Energy of each photon
Number of photons
Speed of photons
Size of photons
None of these
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Question # 6
Which of the following type of force can do no work on the particle on which it acts:
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Frictional force
Gravitational force
Electric force
Centripetal force
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Question # 7
Referring to above figure, current in coil P falls from its maximum value to zero:
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At the instant the switch is closed
At the instant the switch is opened
When switch is kept open
When switch is kept closed
None of these
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Question # 8
Which force is not a conservative force?
Choose an answer
Frictional force
Gravitational force
Electric force
Elastic spring force
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Question # 9
A sinusoidally alternating voltage or current can be graphically represented by a:
Choose an answer
Vector
Rotating vector
Clockwise vector
Anticlockwise voltage vector
None of these
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Question # 10
If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity
Choose an answer
Fringe width will decrease
Fringe width will increase
Fringe width will remain unchanged
Fringe will become less intense
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Question # 11
In the stress-strain graph, stress is increased linearly with strain until a point is reached, this point is known as
Choose an answer
plastic limit
plastic deformation
proportional limit
elastic behaviour
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Question # 12
1 torr = --------------------
Choose an answer
1.20 Nm
-2
1.38 Nm
-2
1.33 Nm
-2
1.31 Nm
-2
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Question # 13
The initial velocity with which a body projected upward and never comes back is called
Choose an answer
Kinetic energy
Terminal velocity
Escape velocity
None of these
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Question # 14
The maximum range of the projectile is the horizontal distance covered is
Choose an answer
Maximum
Distance
Minimum
None of these
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Question # 15
Temperature of a system is defined as
Choose an answer
Initial K.E. of its molecules
Instantaneous K.E. of its molecules
Average K.E. of its molecules
All of these
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Question # 16
Choose an answer
1750 Nm
-2
1980 Nm
-2
1975 Nm
-2
1999 Nm
-2
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Question # 17
The sink in the heat engine is at
Choose an answer
Low temperature
High temperature
Zero temperature
None of these
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Question # 18
A completely transparent material will be invisible in vacuum when the refractive index n is
Choose an answer
Unity
More than unity
Less than unity
Equal to 1.33
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Question # 19
If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity:
Choose an answer
Fringe width will decrease
Fringe width will increase
Fringe width will remain unchanged
Fringe will become less intense
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Question # 20
Plane polarized light can be produced by:
Choose an answer
Simple reflection
Refraction
Selective absorption
All of these
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Question # 21
At certain speed, the time taken by light in moving from M to m and back to M is equal to the time taken by
Choose an answer
Face 4 to 1
Fact 6 to 1
Face 3 to 1
Face 2 to 1
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Question # 22
A ball of mass m
1
and another ball of mass m
2
are dropped from equal heights.If time taken by the balls are t
1
and t
2
respectively then
Choose an answer
t
1
= t
2
/2
t
1
= t
2
t
1
= 4t
2
t
1
= t
2
/4
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