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Physics

Physics
The absolute refractive index of any medium is always:

More than one
Less than one
1

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Physics
Name the process of production of energy in the Sun

Radioactivity
Ionization
Nuclear fusion
Nuclear fission

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Physics
Alternating current is converted into direct current by a

Dynamo
Rectifier
Oscillator
Transformer

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Physics
A ball is thrown vertically upward from the ground. It crosses a point at the height of 25 m twice at an interval of 4 seconds. The ball was thrown with the velocity of

25 m/s
36 m/s
18 m/s
30 m/s

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Physics
Which colour of light shows maximum deviation when passed through a prism ?

White
Green
Violet
Red

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Physics
Water cannot be used to extinguish fire caused by electric current, because

It may cause electrocution
It may cause electrolysis
It may spoil the wiring
It may cause hydrolysis

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