Physics
Indicate the false statement about the resistance of a wire

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

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Physics
Circuit breaker usually operate under

After D. C. component has ceased
Sub-transient state of short-circuit current
Steady state of short-circuit current
Transient state of short-circuit current

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