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NAT II Physical Science Physics MCQs With Answers
Question # 1
The conductivity of a superconductor is
Choose an answer
Infinite
Very large
Very small
Zero
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Question # 2
If tube length of astronomical telescope is 105 cm and magnifying power is 20 for normal setting. Calculate the focal length of objective
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100 cm
10 cm
20 cm
25 cm
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Question # 3
A point charge Q is placed at the mid-point of a line joining two charges, 4q and q. If the net force on charge q is zero, then Q must be equal to
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-q
+q
-2q
+4q
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Question # 4
A planet is observed by an astronomical refracting telescope having an objective of focal length 16 m and an eyepiece of focal length 2 cm.
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The distance between the objective and the eyepiece is 8 m
The angular magnification of the planet is 200
The image of the planet is inverted
The objective is smaller than the eyepiece
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Question # 5
Two forces of 10N and 15N are acting simultaneously on an object in the same direction. Their resultant is
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Zero
5N
25N
150N
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Question # 6
Mechanical waves on the surfaces of a liquid are
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Transverse
Longitudinal
Torsional
both transverse and longitudinal
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Question # 7
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 # 8
The unit of electric current 'ampere' is the amount of current flowing through each of two parallel wires 1 m apart and of infinite length will give rise to a force between them equal to
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1 N/m
2 x 10
-7
N/m
1 x 10
-2
N/m
4 x 10
2
N/m
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Question # 9
The angle between rectangular components of a vector is
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0
°
60
°
90
°
120
°
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Question # 10
For production of beats the two sources must have
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Different frequencies and same amplitude
Different frequencies
Different frequencies, same amplitude and same phase
Different frequencies and same phase
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Question # 11
The modulus of rigidity of a liquid is
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Zero
1
Infinity
A value not one of those mentioned above
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Question # 12
A conducting wire is drawn to double its length. Final resistivity of the material will be
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Double of the original one
Half of the original one
One-fourth of the original one
Same as original one
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Question # 13
A particle moves along a circular path under the action of a force. The work done by the force is
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Zero
Positive and non-zero
Negative and non zero
None of the above
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Question # 14
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 # 15
In an L-R circuit, time constant is that time in which current grows from zero to the value
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0.63 I
o
0.50 I
o
0.37 I
o
I
o
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Question # 16
A man pushes a wall but fails to displace it. He does:
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Negative work
Maximum positive work
Positive work but not maximum
No work
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