Question

A wire of l=1m,resistivity=1.8×10*-6 ,R=23ohm, find cross sectional area

Answer 1

Answer:

we know,

resistance= resistivity×length/ area

23= 1.8×10*-6×1/A

23/1.8×10*-6= A

1.27m2

Explanation:

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Answer 2

Answer:

.078×10*-6m2 formula =R=pL/A