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NAT I Medical Physics MCQs With Answers

Question # 1

Shunt required in an ammeter of resistance R to decrease its deflection from 30 ampere to 10 ampere is

Choose an answer

R/4

R/3

R/2

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Question # 2

A 220 V, 50 Hz, AC 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?

Choose an answer

10 A

5 A

33.3 A

3.33 A

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Question # 3

A train of 150 m length is going towards north direction at a speed of 10 ms^-1 A parrot flies at a speed of 5 ms^-1 towards south direction parallel to the railway track,The time taken by the parrot to cross the train is equal to

Choose an answer

12 s

8 s

15 s

10 s

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Question # 4

A wire is stretched to double of its length.The strain is

Choose an answer

Zero

0.5

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Question # 5

A (100 W, 200 V) bulb is connected to a 160 V power supply. The power consumption would be

Choose an answer

64 W

80 W

100 W

125 W

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Question # 6

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 # 7

In a common base transistor circuit the current gain is 0.98.On changing the emitter current by 5.00 mA, the change in collector current is:

Choose an answer

0.196 mA

2.45 mA

4.9 mA

5.1 mA

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Question # 8

At a certain instant a stationary transverse wave is found to have maximum kinetic energy the appearance of string of that instant is:

Choose an answer

Sinusoidal shape with amplitude A/3

Sinusoidal shape with amplitude A/2

Sinusoidal shape with amplitude A

Straight line

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Question # 9

A particle is moving in a uniform magnetic field then

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Its momentum changes but total energy remains the same

Both momentum and total energy remains the same

Both changes

Total energy change but momentum remains

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