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

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

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Physics
Indicate the false statement about the resistance of a wire

It is directly proportional to the length of 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

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