Question # 1

The Bragg's equation is given by

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The resultant of two forces 3N and 4 N acting at right angle to each other is.

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5 N

6 N

1 N

7 N

The types of optical fibres are

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Three

Four

Five

Six

The time rate of change of angular displacements called.

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Linear velocity

Linear speed

Angular velocity

Angular speed

Carnot cycle consists of.

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Two steps

Three steps

Four steps

Five steps

If 20 waves passes through he medium in 2 sec of 10 ms-1 then he wavelength is.

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200 m

2 m

1 m

0.5 m

The measure of hotness or coldness of a substance is.

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Temperature

Heat

Internal energy

Energy

A body of mass 1.0 Kg dropped from the top of a tower of highest 50 m, what will be its K.E. 10 m below the top

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400 J

490 J

49 J

98 J

The terminal velocity can be obtained by using

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Newton's law

Stock's law

Guass's law

None of these

The first person who attempted to measure the speed of light was.

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Michelson

Hygen's

Galileo

Ability

The magnifying power of an astronomical telescope is 10. If the focal length of objective is 100 cm, then what is the focal length of eye piece.

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10 cm

100 cm

1000 cm

5 cm

The increase in thermal pollution of environment means.

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Increase in the entropy

Decrease in the entropy

Entropy remains constant

Entropy becomes zero

A man of 5000 kg moves with an acceralation of 1 ms-2 force acting on it is.

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5 N

500 N

50 N

5000 N

the acceleration of a body having SHM, depends upon its.

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Time period

Amplitude

Frequency

Displacement from mean position

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

In blue light is used as compare to red light then fringe spacing.

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Increase

Decreases

Remain same

Becomes zero

If the temperature of sink is absolute zero then the efficiency of heat engine engine should be.

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100%

50%

Infinite

zero

If 332 waves pass through a medium in 1 second with speed of 332 ms-1 then wavelength will be

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7 m

332 m

664 m

1 m

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