Question

a 6m long wire has a diameter 0.5 mm it's resistance is 50 ohm find the resistivity and condictiviti​

Answer 1

Explanation:

l=6m

d=0.5mm=5 x10^-4m

r=5/2 x10^-4m

a=πr^2=3.14 x (5/2 x 10-4m) ^2=19.625 x 10^-8m^2

we know that,

R=l/a x p

p=Ra/l=50 x 19.625 x 10^-8

=981.25 x 10-8 ohm-meter

= 9.8125 x 10^-6 ohm-meter