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NAT I Medical Physics MCQs With Answers

Question # 1

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

Choose an answer

i ∞ tan θ

i ∞ θ²

i ∞ θ

i ∞ √θ

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Question # 2

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:

Choose an answer

q = Q/4

q = Q/2

q = Q

None of these

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Question # 3

To explain his theory Bohr used

Choose an answer

Conservation of linear momentum

Conservation of angular momentum

Conservation of quantum frequency

Conservation of energy

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Question # 4

The part of a transistor which is heavily doped to produce large number of majority carriers is

Choose an answer

Emitter

Base

Collector

Any of the above depending on nature of transistor.

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Question # 5

The velocity of falling raindrops attains limited value because of

Choose an answer

Up thrust of air

VIscous force exerted by air

Surface tension effect

Air currents atmosphere

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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

Choose an answer

KE remains constant

PE remains constant

KE/PE is constant

KE + PE remains constant

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Question # 7

The dimensional formula of toque is:

Choose an answer

[ML²T²]

[MLT²]

[ML^-1T^-2]

[ML^-2T^-2]

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Question # 8

The henry is the unit for

Choose an answer

Resistance

Magnetic flux

Magnetic field

Inductance

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Question # 9

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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