Question

Calculate the resistance of 1 km long aluminium wire of diameter 5 mm. Find the
same for a wire made of nichrome alloy.
(Given: Resistivity of aluminium = 2.8 x 10 m,
Resistivity of nichrome = 100 x 10 m)​

Answer 1

R = ρ l / A

A = π r²

ρ = resistivity