Question

calculate the resistance of 100 metre long wire the diameter 1 millimetre and resistivity is 1.6 into 10 to the power minus 8 ohm meter​

Answer 1

Explanation:

R=resistivity×length/ area

given

length=100 m

area=π(0.5)²×10^-6m²

(here radius=. diameter/2 and 1mn=10^-3 m)

resistivity=1.7×10^-8 ohm m

hope you plug and get the resistance as R=6.8/π ohm