R = ?
L = 3.1 m;
r = 1.7 mm/ 2 = 0.85 mm = 0.85 10^(-3) m
Resistivity of copper ( rho ) = 1.68 10 ^(-8) [Ohm m ]
A = 3.15 ( 0.85 10^(-3))^2 = 2.26865 10 ^(-6)
R = ( Rho ) L / A = 1.68 10^(-8) 3.1 m / 2.26865 10^(-6) =
= (1.7 3 .1 / 2.26865 )* 10^(-2) = 0.02323 Ohms ( the resistance )
