Question

wire is drawn such that its cross sectional area changes from A to A/2. The new resistance of the wire is: (a) 2 times (b) 4 times (c ) 8 times (d) 16 times
Kindly give a correct answer for this pls. The one with explanation would be marked as the brainliest
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Answer 1

Explanation:

R is inversely proportional to Area

R/R'=A'/A

R/R'=(A/2) /A

R'=2R