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Physics

Physics
If a copper wire is increased to double its length, its resistance will become

Four times
Double
Half
One–fourth

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Physics
Nuclear reactors used to produce electricity are based on

Nuclear fission
Nuclear fusion
Cold fusion
Superconductivity

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Physics
Intensity of gravitational field of earth is maximum at

Equator
Centre of earth
Surface
Poles

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Physics
Total internal reflection can not take place when light goes from :

Water to air
Glass to water
Water to glass
Glass to air

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Physics
Which of the following is a non renewable source of energy ?

Solar
Wind
Coal
Biogas

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Physics
Hydraulic brakes work on the principle of

Newton's law
Pascal's law
Bernoulli's theorem
Thomson's law

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