Question # 1

The motion of gas molecules is

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In the same direction

Random

Walls of container

Opposite to each other

The magnification of a convex lens of focal length 5 cm is equal to.

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5

6

10

23

Centripetal force perform

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Maximum work

Minimum work

Negative work

No work

the final image obtained by astronomical telescope is.

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Erect

Virtual

Magnified

All of these

The SI unit of work is

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Newton

Joule

Mol

Calorie

Angular momentum has the same unit as

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Impulse x distance

Power x time

Linear x time

work x frequency

The efficiency of a Carnot Heat Engine is 100% if temperature of sink T2 is.

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0 ^oC

0 K

0 ^oF

100 K

Which is the example of vector quantity

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Torque

Speed

Density

Work

According to Newton, sound travels in air under conditions of.

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Adiabatic

Isothermal

Isobaric

Isochoric

Time period of geostationary satellite of radius 'R' is

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1 hour

48 min

1 day

1 month

When the amplitude of a wave become double, its energy becomes

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One half

Two times

Three times

Four times

The internal energy of system does not depend on

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Temperature

Pressure

Path

Final and initial state

The SI unit for measuring plane angle is

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Streadian

Radian

Both a and B

None of these

The Detector in Photo phone is made up of.

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Cadmium

Germanium

Selenium

Silicon

Supplementary units are.

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Three

Two

Five

One

If an object is placed with in the focal length of a convex lens, its image is formed.

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Real

Inverted

Virtual

Smaller than object

The fluid is said to be incompressible, if its density is.

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Zero

Very high

Constant

Very small

When a body is whirled in a horizontal circle by means of string, the centripetal force is supplied by

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Mass of body

Velocity of a body

Tension in the string

Centripetal acceleration

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