Physics
Indicate the false statement about the resistance of a wire

It depends on material of wire
Resistance of metallic wire increases with increase in temperature
It is directly proportional to the area of cross-section of wire
It is directly proportional to the length of wire

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Physics
A dynamo is used to convert

Electrical energy into mechanical energy
Electrical energy into magnetic energy
Magnetic energy into mechanical energy
Mechanical energy into electrical energy

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Physics
The earth is a

Good absorber and good radiator of heat
Good reflector of heat
Non-absorber of heat
Bad absorber and bad radiator of heat

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