Question

What happens to resistance when area of cross section is half?

Answer 1

The resistance of conductor is directly proportional to length and inversely proportional to area of cross section.When the length is doubled the area of cross section also gets doubled.

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When the area of cross section is halved then resistance becomes double .

Answer 2

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Resistance of a conductor is inversely proportional to the cross section of a conductor

✪ The relationship is given below-

Resistance - Resistivity * (Length / Area)

✪All other parameters remaining same, if cross section is reduced to half , then the resistance will be double.