InterviewSolution
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InterviewSolution
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(i) At what temperature would the resistance of copper conductor be double its resistance at 0^(@)C. (ii) Does this temperature hold for all copper conductors regardless of shape and size? Given alpha for Cu=3.9xx10^(-3)""^(@)C^(-1). |
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Answer» Solution :(i) `alpha=(R_(2)-R_(1))/(R_(1)(t_(2)-t_(1)))=(2R_(0)-R_(0))/(R_(0)(t-0))=(1)/(t)` `t=(1)/(alpha)=(1)/(3.9xx10^(-3))=256^(@)C` 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. |
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