Let's consider the two parallel wires to carry currents, i1 and i2, and to be separated by a distance d.
Sources of magnetism and magnetic force
Force between two infinite, parallel wires
You are given two infinite, parallel wires each carrying current I. The wires are separated by a distance d, and the current in the two wires is flowing in the same direction. This problem concerns the force per unit length between the wires.
A) Is the force between the wires attractive or repulsive?
B) What is the force per unit length F/L between the two wires?
Express your answer in terms of I, d, and constants such as µ0 and π
C) In the SI system, the unit of current, the ampere, is defined by this relationship using an apparatus called an Ampere balance. What would be the force per unit length of two infinitely long wires, separated by a distance 1m, if 1A of current were flowing through each of them?
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Magnetic Force Between Parallel Currents concept. You can view video lessons to learn Magnetic Force Between Parallel Currents. Or if you need more Magnetic Force Between Parallel Currents practice, you can also practice Magnetic Force Between Parallel Currents practice problems.