Question

calculate the resistance of a metal wire of length 2m and area of cross section 1.55 x 10^-6 m^2, if the resistivity of the metal be 2.8 x 10^-8 ohm m.​

Answer 1

Explanation:

calculate the resistance of a metal wire of length 2m and area of cross section 1.55 x 10^-6 m^2, if the resistivity of the metal be 2.8 x 10^-8 ohm m.

Answer 2

Explanation:

We know that,

$R = \rho \frac{l}{A}$

$\implies \: 2.8 \times {10}^{ - 8} \times \frac{2}{1.55 \times {10}^{ - 6} }$

$\implies \: 2.8 \times {10}^{ - 2} \times \frac{2}{1.55}$

$\implies \: \frac{28}{10} \times \frac{1}{ {10}^{2} } \times \frac{2}{1.55}$

0.036 ohm's