Question

(i) At what temperature would the resistance of a copper conductor be double its resistance at 0°C. 

(ii) Does this temperature hold for all copper conductors regardless of shape and size? Given a for Cu = 3.9 x 10^-3 °C^-1 .

Answer 1

Thus the resistance of copper conductor becomes double at 256 °C. 

(ii) Since a does not depend on size and shape of the conductor. So the above result holds for all copper conductors