Question

solv
$a \: wire \: has \: a \: circular \: cross \: section \: \\ of \: radius2mm \: and \: resistivityof \\ its \: material \: is \: 2 \times 10 {} ^{ - 10} ohm \: meter. \\ find \: the \: length \: of \: the \: thin \: wire \: \\ whose \: resistance \: is \: 20ohm.$
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Answer 1

Answer:

L = 1256 × 10^ 3 m

Explanation:

kindly refer to attachment.

Answer 2

Answer:

l=1256 ×10 ^3 m

Explanation:

Dear please refer to the attachment ..