Question

3) ows The resistivity of Copper is 1.7x10r.m. What current flow through a 2.om long Copper conductor of in cross section when aoris - 4 2 1.08 10 applied?

Answer 1

here,

the resistivity of copper , p = 1.7 * 10^-8 ohm.m

length of wire , l = 2 m

cross-sectional area , A = 1 * 10^-4 m^2

potential difference , V = 20 V

the current in the wire , I = V /R

I = V /(p * l /A)

I = 20 /( 1.7 * 10^-8 * 2 /(1 * 10^-4)) A

I = 5.88 * 10^4 A