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NAT I Engineering Physics MCQs With Answers

Question # 1

Boyle's law is applicable in

Choose an answer

Isochoric process

Isothermal process

Isobaric process

Isotonic process

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Question # 2

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 # 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 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 # 5

Which of the following sources give discrete emission spectrum?

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Incandescent electric bulb

Sun

Mercury vapour lamp

Candle

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Question # 6

Angular momentum is

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Vector (axial)

Vector (polar)

Scalar

None of these

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Question # 7

To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined

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Parallel

Antiparallel

At angle 60°

Perpendicular to each other

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Question # 8

The temperature at which the speed of sound becomes double as was at 27°C is

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273°C

0°C

927°C

1027°C

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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

Radio waves of constant amplitude can be generated with

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Rectifier

Filter

FET

Oscillator

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Question # 11

The velocity v of a particle at time t is given by:

v = at + b / t + c

The dimensional formula of a,b and c care respectively:

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L² ; T and LT²

LT² ; LT and L

LT^-2; L and T

L;LT and T^-2

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