Question # 1

When the car moves with an increasing acceleration then its velocity time graph is always

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Constant

Variable

A straight line

A curve

Entropy of measure of.

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Internal energy of system

Order of system

Disorder of system

Potential energy of system

Pascal is famous for his work

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Hydrodynamics

Hydrostatics

Laws of gases

Behaviour of elastics bodies

When two identical travelling waves are superimposed, velocity of resultant wave.

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Decreases

Increases

Remain same

Becomes zero

A 2 meter of high tank is full of water. If a hole appears at its middle, then the speed of efflux is.

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4.4 ms-1

10 ms-1

6.2 ms-1

20 ms-1

A body of mass 2 kg moving with velocity of 4 ms-1 has K.E. equal to.

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16 J

8 J

32 J

2 J

The slope of velocity time graph shows

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Total distance covered

Average acceleration

Instantaneous acceleration

Torque

Before the launch of a rocket the mass of fuel of the rocket is approximately consists of.

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60%

50%

80%

100%

The weight of an object an elevator moving down with an acceleration of 9.8 m/s2 will becomes

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Half

Double

Unchanged

Zero

The temperature scale which is independent of nature of substance is.

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Thermodynamic scale

Centigrade scale

Fahrenheit scale

Regnault scale

When a fore of 100 N is acting on an object along x-axis then its vertical component will be.

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50 N

0 N

25 N

10 N

The work done in gravitational field

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Depend upon the path

Does not depend upon the path

(+)ve

Zero

The Newton's formula for the speed of sound in air is

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The Idea that light is electromagnetic waves was indroduced by

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Maxwell Planck

Newton

Fermi

Crooks

Which one of the following force cannot do any work on the particle on which it acts.

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Fractional force

Gravitational force

Electrostatic force

Centripetal force

An athlete runs with a speed of 12 ms-1. Determine the longest jump he can undertake.

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12 m

14.4 m

24 m

16.2 m

Han discovered uranium fissionin

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1940

1938

1935

1939

Satellites are the objects that orbit around the

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Moon

Sun

Earth

Star

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