Question # 1

The internal energy of a piece of lead when beaten by hammer will.

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Increase

Decrease

Remains constant

Increases and then decrease

Watt -m2 is the unit of

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Energy

Intensity

Power

Work

The types of optical fibres are

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Three

Four

Five

Six

The frictional effect between the different layers of fluid is called

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Terminal velocity

Stock's law

Viscosity

Surface tension

The error in a certain measurement occurs due to

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Negligence of a person

In appropriate technique

Faulty Appraatus

All of rhe above

Standard metal according to Michelson's interferometer is equivalent to

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1553163.5 wave meter

3 x 108meter

15503000 meter

None of these

Stoke's law holds for bodies having.

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Spherical shape

Oblong shape

Rectangular shape

All shapes

Air blows from

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High pressure to low pressure

Low pressure to high pressure

Low temperature to high temperature

High temperature to low temperature

If the slope of the velocity time graph remain constant then body is moving with.

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Uniform velocity

Negative variable acceleration

Variable acceleration

Uniform acceleration

The location of near point changes with

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Age

Size of the eye

Sharpness of the eye

None of these

the angular version of F= ma is

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L = 1w

pi = 1a

l = pi a

f = mv/t

Which quantity of the following is dimensionless.

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Angular velocity

Centripetal force

Angular acceleration

Angular displacement

Change of momentum is equal to

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Force

Tension

Impulse

Pressure

An oscillating mass-spring system produces

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Sound waves

Electromagnetic waves

Light waves

Periodic waves

Horizontal range is maximum when the angle of projectile is.

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0 o

30 o

45 o

60 o

If a vector of magnitude 10 N along y-axis then its component along x-axis is

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0 N

5 N

8.66 N

10 N

Dot product of vector with itself is.

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Zero

2 A

A²

A

Using a graded Index fibre, the time difference is reduced to about.

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1 ns per km

33 ns per 100 km

33 ns per km

1 ns per 100 km

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