Q 5 A piece of metal has a cross-sectional area of 3 cm and a length of 6 km If the potential difference between its two ends is 120 v, calculate 1- electrical resistance 2- electric current - current...

Q 5 A piece of metal has a cross-sectional area of 3 cm and a length of 6 km If the potential difference between its two ends is 120 v, calculate 1- electrical resistance 2- electric current - current density of the electric field where the specific resistance is 2.1 and 6 x 107 *


Extracted text: Q 5 A piece of metal has a cross-sectional area of 3 cm and a length of 6 km If the potential difference between its two ends is 120 v, calculate 1- electrical resistance 2- electric current - current density of the electric field where the specific resistance is 2.1 and 6 x 107 *