Question # 1

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

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Emitter

Base

Collector

Any of the above depending on nature of transistor

The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12. If the resultant is at 90°with the force of the smaller magnitude, then their magnitudes are:

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3, 15

4, 14

5, 13

6, 12

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

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Sinusoidal shape with amplitude A/3

Sinusoidal shape with amplitude A/2

Sinusoidal shape with amplitude A

Straight line

In a voltmeter the conduction takes place due to

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Electrons only

Holes only

Electrons and holes

Electrons and ions

In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie

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Ultraviolet

Infrared

Visible

X-ray

The velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is:

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8

4

6

7

Radio waves of constant amplitude can be generated with

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Rectifier

Filter

FET

oscillator

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved

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1.92 N

19.2 N

12 N

0.192 N

Which of the following four statement is false?

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A body can have zero velocity and still be accelerated

A body can have a constant velocity and still have a varying speed

A body can have a constant speed and still have a varying velocity

The direction of the velocity of a body can change when its acceleration is constant

Two forces of 10N and 15N are acting simultaneously on an object in the same direction. Their resultant is

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Zero

5N

25N

150N

At constant volume temperature is increased. Then

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Collision on walls will be less

Number of collisions per unit time will increase

Collisions will be in straight lines

Collisions will not change

A man pushes a wall but fails to displace it. He does:

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Negative work

Maximum positive work

Positive work but not maximum

No work

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

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0.1 watt

1 watt

10 watt

100 watt

The conductivity of a superconductor is

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Infinite

Very large

Very small

Zero

The motion without consideration of its cause is studied in

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Kinematics

Mechanics

Statics

Modern Physics

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NAT II Physical Science Physics MCQs With Answers

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