Question

Calculate the resistance of an aluminium 20 meter long and 25 millimeter square in cross section​

Answer 1

Answer:

R = 2.12 x 10∧-2 ohm

Explanation:

R = ?

L = 20 m

A = 25 mm² =25 x 10∧-6 m²

rho = 2.65 x 10∧-8 ohm meter

R = 2.65 x 10∧-8 x 20 / 25 x 10∧-6

R = 2.12 x 10∧-2 ohm