Question

what would be new resistance if length of conductor is doubled and thickness is halred​

Answer 1

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.

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Answer 2

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Explanation:

Initial length of the conductor l1=l Final length of the conductor l2=2l Initial cross-sectional area A1=A Final cross-sectional area A2=2A The resistance of conductors given by R=ρ1A∝1A As both the length and area are doubled Hence, there will be no change in the resistance of the conductor and so it will remain ...