Question

The resistance of a wire is 0.01 cm radius is 10 ​​Ὡ. If the resistivity of the material of the wire is 50 x 10-8 ​Ὡm. Find the length of the wire

Answer 1

we know
Resistance (R) = (resistivity x length )/ Area
then L =(R x A)/resistivity
= (10xπ r²)/ 50x10^-8
where r is radius
substitute the values u will get the answer