Answer to Question #334039 in Mechanics | Relativity for Khadijah

Question

 coil of wire 4 m long has a resistance of 20 2. If its resistivity is 108 x 10*2 m, find its

area of cross-section

Answer 1

$R=\frac{\rho l}S,$

$S=\frac{\rho l}R=0.04~mm^2.$