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NAT I Medical Physics MCQs With Answers

Question # 1

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 # 2

The contrast in the fringes in any interference pattern depends on

Choose an answer

Fringe width

Intensity ratio of the sources

Distance between the slits

Wavelength

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Question # 3

A point charge Q is placed at the mid-point of a line joining two charges 4q and q. if the net force on charge q is zero. then Q must be equal to

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-q

-2q

+4q

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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

Velocity of sound in a diatomic as is 300 m/sec what is its rms velocity

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400 m/sec

40 m/sec

430 m/sec

300 m/sec

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Question # 6

Ultra-violet radiation of 6.2 eV falls on an aluminium surface K.E of fastest electrons emitted is(work function = 4.2 eV)

Choose an answer

3.2 x 10-21 J

3.2 x 10-19 J

7 x 10-25 J

9 x 10-32 J

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Question # 7

The de broglie wave corresponding to a particle of mass m and velocity v has a wavelength associated with it

Choose an answer

h/mv

hm v

mh/v

m/hv

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Question # 8

Which of the following lists of physical quantities consists only of vectors:

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Time,temperature,velocity

Force,volume,momentum

Velocity,acceleration,mass

Force,acceleration,velocity

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Question # 9

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

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Zero

0.5

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