Question

calculator the resistance of a copper wire 20 mater long and diameter of 0.05 cm​

Answer 1

Answer:

length of the copper=20m

diameter=0.05cm

change it in meter=0.05÷100=0.0005

RESISTIVITY OF CU=1.72×10^-8

FORMULA= R=RHO(P)×LENGTH÷AREA

area=pie ×r^2

R=1.72×10^-8×20×7÷22×0.0005×0.0005

=2.5 ohm

hope....it will help u