Question

Two long parallel current-carrying conductors are 0.4 m apart in air and carry currents 5 A and 10A. Calculate the force per metre on each conductor, if the currents are in the same direction and in the opposite direction.

Answer 1

Data: s = 0.4 m, I¹ = 5A, 

I₂ = 10A 

μ₀ /4π = 10^-7 N/A² 

The force per unit length acting on each conductor is

This force is attractive if the currents are in the same direction and repulsive if the currents are in the opposite directions.