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NAT II Physical Science Physics MCQs With Answers
Question # 1
A 220 V, 50 Hz. A.C. 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 # 2
Ball pen function on the principle of
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Viscosity
Boyle's law
Gravitational force
Surface tension
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Question # 3
The essential distinction between X-rays and
γ-rays is that
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γ-rays have smaller wavelength than X-rays
γ-rays emanate from nucleus while X-rays emanate from outer part of the atom
γ-rays have greater ionizing power than X-rays
γ-rays are more penetrating than X-rays
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Question # 4
The fundamental unit which has same power in the dimensional formula of surface tension and viscosity is:
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Mass
Length
Time
None
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Question # 5
The peak voltage in 220 volt A.C. supply is nearly
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220 volt
253 volt
311 volt
440 volt
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Question # 6
The incorrect statement regarding the lines of force of the magnetic field B is
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Magnetic intensity is a measure of lines of force passing through unit area held normal to it
Magnetic lines of force form a close curve
Inside a magnet, its magnetic lines of force move from north pole of a magnet towards its south pole
Due to a magnet magnetic lines of force never cut each other
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Question # 7
In a simple harmonic motion the kinetic energy (KE) and the potential energy (PE), are such that throughout the motion
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KE remains constant
PE remains constant
KE/PE is constant
KE+PE remains constant
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Question # 8
The percentage errors in the measurements of mass and speed are 2% and 3% respectively. How much will be the maximum error in the estimate of the kinetic energy obtained by measuring mass and speed
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11%
8%
5%
1%
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Question # 9
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 # 10
What remains constant in the field of central force?
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Potential energy
Kinetic energy
Angular momentum
Linear momentum
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Question # 11
A particle moving in a magnetic field has increase in its velocity, then its radius of the circle
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Decreases
Increases
Remains the same
Becomes half
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Question # 12
The force between two charges 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become
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7.20 N
11.25 N
22.50 N
45.00
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Question # 13
The frequency of the incident light falling on a photosensitive metal plate is doubled, the kinetic energy of the emitted photoelectrons is
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Double the earlier value
Unchanged
More than doubled
Less than doubled
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Question # 14
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 # 15
To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined
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Parallel
Antiparallel
At angle 60
°
Perpendicular to each other
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Question # 16
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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