Forces on Parallel Conductors – Practice


1) Two conducting wires, A and B, have currents flowing through them in the same direction and are separated by a distance of 10cm. What is the magnitude and direction of the force per unit length acting between the wires if conductor A has a current of 10A and conductor B has a current of 15A?

2) What is the magnitude of the force acting between a 4cm section of wire carrying a current of 2.5A and another conductor with a current of 10A? The conductors are separated by a distance of 1cm:


Quick Answers:

1) 3 × 10-4 N/m (attraction)

2) 2 × 10-5 N 

Worked Answers: