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Physics

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

Half
Double
One–fourth
Four times

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Physics
A person does some work of 1,000 J in 2 s. His power will be ________

25W
50W
1000W
500W

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Physics
Which of the following is a Non Renewable Resource of Energy?

Solar Energy
Natural Gas
Hydrogen Fuel
Wind Power

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Physics
An atom with more neutrons than protons is called

Isotope
Compound
Element
None of these

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Physics
According to special theory of relativity the mass of a particle

Decreases with decrease in velocity.
Is independent of its velocity.
Increases with increase in velocity with respect to an observer.
Decreases with increase in velocity.

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Physics
The mercury and sodium street lamps light up because of :

Atomic emission
Atomic absorption
Electron emission
Electron absorption

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