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NAT I Computer Science Physics MCQs With Answers

Question # 1

If the dot product of two non-zero vectors vanishes the vectors will be

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In the same direction

Opposite to each other

Perpendicular to each other

Zero

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Question # 2

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 # 3

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 # 4

A capacitor acts as an infinite resistance for

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Both AC and DC

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Question # 5

How much water a pump of 2kW can raise in one minute to a height of 10 m. take g = 10 m/s²?

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1000 liters

1200 liters

100 liters

2000 liters

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Question # 6

A p-n junction has a thickness of the order of

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1 cm

1 mm

10^-6 cm

10^-12 cm

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Question # 7

Planck's constant has the dimensions of:

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Energy

Momentum

Frequency

Angular momentum

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Question # 8

The average power dissipation in a pure capacitor in AC circuit is

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1/2 CV²

CV²

2CV²

Zero

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Question # 9

The volt/metre is the unit of:

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Potential

Work

Force

Electric field intensity

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Question # 10

According to the Hooke's law the force required to change the length of a wire by '1' is proportional to

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1^-2

1^-1

1²

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Question # 11

If in a moving coil galvanometer a current 1 produces a deflection θ then

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i ∞ tan θ

i ∞ θ²

i ∞ θ

i ∞ √θ

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