Question

if the length of conductor is doubles and diameter is half then what may be the new resistance​

Answer 1

Answer:

Explanation:New resistance is 8 times the old resistance. If the length is double then the resistance would increase by 8 times.

Since R=P*L/A (Resistivity constant) length becomes 2L and area becomes 1/4th.

So, almost the new resistance increase by 4 times.