Question

Please solve the question in the copy step by step solutions.
A metal wire has diameter of 0.25 mm and electrical resistivity of 0.8×10^-8 ohm-m​.

(i) what will be the length of this way to make a resistance 5 Ohm?

(ii) how much will the resistance change, if the diameter of the wire is doubled?​

Answer 1

Explanation:

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