Question # 1

Multimode graded index fibre has a core whose diameter range lie from.

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5 to 50 micro meter

50 to 100 micro meter

40 to 1000 micro meter

50 to 10,000 micrometer

Sodium chloride in a flame gives

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Green light

White light

Red light

Yellow light

The time rate of change of angular displacements called.

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Linear velocity

Linear speed

Angular velocity

Angular speed

SI unit of work

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Newton

Walt

Pascal

Joule

When the body moves with constant acceleration the velocity time graph is

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Parabola

Hyperbola

Straight line

Curve

The angle of projection for which its maximum height and horizontal range are equal

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46 ^o

56^o

66^o

76^o

Work is a

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Scalar quantity

Vector quantity

Basic quantity

None of these

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

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

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Adiabatic

Isothermal

Isobaric

Isochoric

The velocity of a particle having SHM is 'v' at means position. If its amplitude is doubled them velocity at mean position will be

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v/2

v

2v

4 v

The horizontal component of velocity of projectile

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Increases

Decreases

Remain same

Decreases and then increases

P.E. of a spring is stored in

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Spring

mass

Both of them

None of these

A body covers a distance of 10 m in 1 sec with a constant velocity of 10 ms-1 , Acceleration produced by the body is.

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0 ms-1

2 ms-2

5 ms-2

10 ms-2

A communication satellite is used ot reflect the signal of.

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Microwaves

Radio waves

y rays

x -rays

The path followed by a projectile in known as its

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Range

Trajectory

Cycle

Height

Which one is renewable source of energy.

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Coal

Uranium

Biomass

Natural gas

By increasing the amount of stretch in spring the force exerted will

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Increase

One watt

One erg

One joule

Pascal is the unit of

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Pressure

Force

Tension

Weight

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