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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
The average binding energy of a nucleus inside an atomic nucleus is about
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8 MeV
8 eV
8 Joules
8 ergs
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Question # 3
A cable breaks if stretched by more than 2 mm. It is cut into two equal parts. How much either part can be stretched without breaking?
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0.25 m
0.5 m
1 mm
2 mm
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Question # 4
If the earth were to rotate faster, than its present speed the weight of an object will
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Increase at the equator but remain unchanged at the poles
Decrease at the equator but remain unchanged at the poles
Remain unchanged at the decrease but decrease at the poles
Remain unchanged at the equator but increase at the poles
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Question # 5
Which of the following particles would experience the largest magnetic force when projected with the same velocity perpendicular to a magnetic field?
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Proton
Electron
He
+
Li
+
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Question # 6
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 # 7
A converging lens is used to form an image on a screen. When the upper half of the lens is covered by an opaque screen
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Half the image will disappear
No change either in size or in intensity
Intensity of image will increase
Intensity of the image will decrease
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Question # 8
A sun rise or sun set, the sun looks reddish because:
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The sun is coldest at these times
Of the effects of reflection and refraction
The sun is hottest at these times
Of the scattering of light
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Question # 9
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 # 10
Band spectrum is produced by
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H
He
H
2
Na
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Question # 11
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 # 12
The velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is:
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8
4
6
7
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Question # 13
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 # 14
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 # 15
To make the frequency double of an oscillator, we have to
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Double the mass
Half the mass
Quadruple the mass
Reduce the mass to one fourth
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Question # 16
Electrons in the atom are held in the atom due to
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Coulomb forces
Nuclear forces
Gravitational forces
Van der Waal's forces
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