Question # 1

The frictional effect between the different layers of fluid is called

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Terminal velocity

Stock's law

Viscosity

Surface tension

The light energy travels in space as waves was firstly proposed by

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Maxwell

Young

Einsten

Hydrogen

A force applied on a body produces acceleration in

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Opposite direction

perpendicular direction

Its own direction

In any direction

A typical diffraction grating has certain number of lines per centimeter whose range is.

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40 to 50

400 to 5000

400 to 500

4000 to 5000

Speed of sound in vacuum is

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280 ms-1

332 ms-1

333 ms-1

Zero ms-1

Which phenomenon of light proves that light waves are transverse in nature.

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Refraction

Reflection

Diffraction

Polarization

Unit of acceleration is

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ms-1

ms

ms-2

m2s

The speed of sound is greater in solids due to their high.

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Density

Pressure

Temperature

Elasticity

A constant temperature, if pressure of a given mass of gas is halved, then its volume becomes.

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Halve

Doubled

Four time

Constant

Stoke's law holds for bodies having.

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Spherical shape

Oblong shape

Rectangular shape

All shapes

Size of the molecules is much smaller as compared to the

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Mass of the molecules

Distance between the molecules

Density of the molecules

Volume of the molecules

The speed of sound in air does not depend upon

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Temperature

Pressure

Density

Medium

If the initial velocity of a projectile becomes doubled, the time of fight will be.

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Same

4 times

Double

3 times

The distance between two consecutive trough is called.

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Displacement

Amplitude

Wave length

Wave front

The speed of light was measured correctly by

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Galileo

Michelson

Newton

Maxwell

A gas performs 10 J of work while expanding adiabatically. the change in its internal energy is.

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10 J

-10 J

100 J

-200 J

The slope of velocity time graph shows

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Total distance covered

Average acceleration

Instantaneous acceleration

Torque

The velocity of a projectile is maximum

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At the highest point

At point of launching and just before striking the ground

At half of the height

After striking the ground

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