When the length of a copper wire is doubled,keeping its area of cross-section same,the its resistivity is:1.doubled 2.halved 3.no change 4.none of these.
Choose the correct option and also try to explain it.
Answers
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3
Answer:
3 . no change
Explanation:
because the length of copper wire is double. and it's cross sections are same. then it's resistivity is same.
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