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NAT I Computer Science Physics MCQs With Answers
Question # 1
In an L-R circuit time constant is that time in which current grows from zero to the value
Choose an answer
0.63 I
o
0.50 I
o
0.73 I
o
I
o
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Question # 2
Two sources of sound are said to be coherent if
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They produce sounds of equal intensity
They produce sounds of equal frequency
They produce sound waves vibrating with the same phase
They produce sound waves with zero or constant phase difference all instant of time
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Question # 3
A body moves a distance of 10 m along a straight line under the action of a force of 5 Newtons, if the work done is 25 joules the angle which the force takes with the direction of motion of the body is:
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0°
30°
60°
90°
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Question # 4
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 # 5
Which of the following four statements is false?
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A body can have zero velocity and still be accelerated
A body can have a constant velocity and still have a varying speed
A body can have a constant speed and still have a varying velocity
The direction of the velocity of a acceleration is constant
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Question # 6
Two point charge +3μC and +8μC repel each other with a force of 40 N. if a charge of -5μC is added to each of them then the force between will become
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-10N
+10N
+20N
-20N
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Question # 7
A charge Q is divided into two parts q and Q - q and separated by a distance R. the force of repulsion between them will be maximum when:
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q = Q/4
q = Q/2
q = Q
None of these
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Question # 8
If two non-zero vector ̅A̅ and ̅B are parallel to each other, then ̅A̅, ̅B is equal to
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Zero
AB
A + B
A - B
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Question # 9
What will be the ratio of the distance moved by a freely falling body from rest in 4
th
and 5
th
seconds of journey?
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4 : 5
7 : 9
16 : 25
1 : 1
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Question # 10
With the increase of temperature viscosity
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Increase
Decrease
Remains same
Doubles
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Question # 11
The structure of solids is investigated by using
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Cosmic Rays
X-rays
Intra red Radiation
y-rays
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