Question

calculate the resistance of 2km length of aluminium over head power cable if the cross sectional area of a cable is 100mm^2.take the resistivity of aluminium to be 0.03x10^-6​

Answer 1

Step-by-step explanation:

ρ = resistivity of aluminum = 0.03 x 10^-6 Ωm

L = length of cable = 2 km = 2000 m

A = cross-sectional area of cable = 100 mm^2 = 100 x 10^-6 m^2

By substituting the given values in the above formula, we get:

R = (0.03 x 10^-6 Ωm * 2000 m) / (100 x 10^-6 m^2)

R = 0.6 Ω

Therefore, the resistance of the 2km length of aluminum overhead power cable is 0.6 Ω.