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Online Tests
Physics General Science Test Hard Mode MCQs With Answers
Question # 1
Which of the following is a scalar quantity
Choose an answer
Density
Displacement
Torque
Weight
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Question # 2
In LCR series AC circuit the phase angle between current and voltage is
Choose an answer
Any angle between 0 and ±π/2
π/2
π
Any angle between 0 and π/2
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Question # 3
A 220 V, 50 Hz, AC source is connected to an inductance of 0.2.H and a resistance of 20 ohm in series What is the current in the circuit?
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10 A
5 A
33.3 A
3.33 A
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Question # 4
Copper and germanium are cooled to 70 K from room temperature then
Choose an answer
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 # 5
A body moving in circular motion with constant speed has
Choose an answer
Constant velocity
Constant acceleration
Constant kinetic energy
Constant displacement
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Question # 6
Band spectrum in produced by
Choose an answer
H
He
H
2
Na
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Question # 7
A photocell with a constant p.d of V volt across it illuminated by a point source from a distance of 25 cm. When the source is moved to a distance of 1 m, the electrons emitted by the photocell
Choose an answer
Carry 1/4th their previous energy
Are 1/6th as numerous as before
Are 1/4th as numerous as before
Carry 1/4th their previous momentum
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Question # 8
If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in he form of heat will be
Choose an answer
0.1 watt
1 watt
10 watt
100 watt
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Question # 9
A p-n junction has a thickness of the order of
Choose an answer
1 cm
1 mm
10
-6
cm
10
-12
cm
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Question # 10
A man pushes a wall but fails to displace it. He does:
Choose an answer
Negative work
Maximum positive work
Positive work but not maximum
No work
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Question # 11
Steel is preferred for making springs over copper.Whey?
Choose an answer
Steel is cheaper
Young's modulus of steel is more than that of copper
Young's modulus of copper is more than that of steel
Steel is less likely to be oxidized
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Question # 12
If the period of oscillation of mass (M) suspended from a spring is 2s, then the period of mass 4M will be
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1 s
2 s
3 s
4 s
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Question # 13
Absolute temperature can be calculated by
Choose an answer
Mean square velocity
Motion of the molecule
Both A and B
None of these
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Question # 14
The magnetic moment of a circular coil carrying current is
Choose an answer
Directly proportional to the length of the wire in the coil
Inversely proportional to the length of the wire in the coil
Directly proportional to the square of the length of the wire in the coil
Inversely proportional to the square of the length of the wire in the coil
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Question # 15
Two electric bulbs of 200 W and 100 W have same voltage. If R
1
and R
2
be their resistance respectively then
Choose an answer
R
1
=2R
2
R
2
=2R
1
R
2
=4R
1
R
1
=4R
2
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Question # 16
Ball pen function on the principle of
Choose an answer
Viscosity
Boyle's law
Gravitational force
Surface tension
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Question # 17
A photoelectric cell coverts
Choose an answer
Electrical energy to light energy
Light energy to light energy
Light energy to electrical energy
Light energy to elastic energy
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Question # 18
Who explained the origin of the Fraunhoffer lines?
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Fraunhoffer
Kirchhoff
Fresnel
Snell
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Question # 19
If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be
Choose an answer
0.1 watt
1 watt
10 watt
100 watt
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Question # 20
Energy is stored in the choke coil in the form of
Choose an answer
Heat
Magnetic energy
Electric energy
Electro-magnetic energy
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Question # 21
Angular momentum is
Choose an answer
Vector (axial)
Vector (polar)
Scalar
None of these
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Question # 22
The mass defect for the nucleus of helium is 0.0303 a.m.u. What is the binding energy per nucleon for helium in MeV?
Choose an answer
28
7
4
1
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