Answer
(a) $R = 1.5~\Omega$
(b) $R = 3.5~\Omega$
Work Step by Step
(a) We can find the resistance:
$R = \frac{\rho~L}{A}$
$R = \frac{\rho~L}{\pi~r^2}$
$R = \frac{(2.4\times 10^{-8}~\Omega~m)(2.0~m)}{(\pi)~(0.10\times 10^{-3}~m)^2}$
$R = 1.5~\Omega$
(b) We can find the resistance:
$R = \frac{\rho~L}{A}$
$R = \frac{(3.5\times 10^{-5}~\Omega~m)(0.10~m)}{(1.0\times 10^{-3}~m)^2}$
$R = 3.5~\Omega$
