Question # 1

A ray of light is a line

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Parallel to wave front

Normal to wave front

Anti-parallel to wave

Any one of these

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 unsteady flow of a fluid is called

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Stream line

Turbulent flow

Average flow

Viscous flow

The fundamental quanties which form basic for M.K.S system are

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Mass , Length , and time

Mass, acceleration and time

Mass, work and time

Velocity, force and time

Example of thin film is.

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Soap burble

convex lens

Concave lens

Glass plate

the work done in isochoric process is.

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Constant

Variable

Zero

Depend upon condition

Symbolically solid angle is represented as

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Sr

rad

0

cd

Frequency 'f' and time period 'T' are related as

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Computer Chips are made of

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carbon

Gemanium

Silicon

Sodium

The weight of the body at the centre of earth is

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Maximum

Minimum

Zero

Infinite

The direction of angular velocity is determined.

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Left hands rule

Head to tail rule

Right hand rule

General rule

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

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One half

Two times

Three times

Four times

The wavelength of X-rays is of the order of.

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10^-8 m

10^-10m

10^-5m

10^-4m

In young's double slit experiment for the interference the central region will be

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Dark

Bright

Coloured

None of these

Force 12 N and 5 N are add, the resultant con not be

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13 N

6 N

7 N

17 N

A set of frequencies which are multiples of the fundamental frequency are called.

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Doppler effect

Nodal frequencies

Beat frequencies

Hamonics

The distance between two consecutive crests of troughs is called

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Time period

Wave length

Frequency

Displacement

In stationary waves, the particle velocity at nodes is

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Minimum

Maximum

Zero

Constant

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