A heater wire of resistance R is cut into 2 equal parts what will happen to the resistance of the new piece?
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Resistance of a piece of wire is proportional to its length. A piece of wire has a resistance R. The wire is cut into five equal parts.
Therefore, resistance of each part =R/5
All the five parts are connected in parallel.
∴equivalent resistance
Therefore, resistance of each part =R/5
All the five parts are connected in parallel.
∴equivalent resistance
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Resistance will change to half but not resistivity.
Resistivity is property of the material of the wire so it won't change.
Resistivity is property of the material of the wire so it won't change.
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