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NAT I Engineering Physics MCQs With Answers

Question # 1

If the metal bob is a simple pendulum is replaced by a wooden bob, then its time period will

Choose an answer

Increase

Decreases

Remain the same

First 'A' then 'B'

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Question # 2

Which of the modulus of elasticity is involved in compressing a rod to decrease its length?

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Young's modulus

Bulk modulus

Modulus of rigidity

None of the above

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Question # 3

A motorist travels A to B at a speed at 40 km/h and returns at speed of 60 km/h. His average speed will be:

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40 km/h

48 km/h

50 km/h

60 km/h

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Question # 4

The mass defect for the nucleus of helium is 0.0303 a.m.u What is the binding energy per nucleon for helium in MeV?

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Question # 5

The fundamental unit which has same power in the dimensional formula of surface tension and viscosity is:

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Mass

Length

Time

None

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Question # 6

In an L-R circuit time constant is that time in which current grows from zero to the value

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0.63 I_o

0.50 I_o

0.73 I_o

I_o

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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

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h/mv

hm v

mh/v

m/hv

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Question # 8

A prism splits a beam of white light into its seven constituent colors this is so because

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Phase of different colors is different

Amplitude of different colors is different

Energy of different colors is different

Velocity of different colors is different

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Question # 9

Which of the following is not thermo dynamical function?

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Enthalpy

Work done

Gibb's energy

Internal energy

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Question # 10

A person standing on a rotating platform has his hands lowered He suddenly outstretches his arms.The angular momentum

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Becomes zero

Increases

Decreases

Remains the same

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