12.3 Magnetic Force between Two Parallel Currents
Attraction when currents run the same way and repulsion when opposed, force per unit length, and the definition of the ampere that follows.
University Physics Volume 2, 12.3 Magnetic Force between Two Parallel Currents
3 exercises
12.3 Exercise 1
Two wires, both carrying current out of the page, have a current of magnitude 2.0 mA and 3.0 mA, respectively. The first wire is located at (0.0 cm, 5.0 cm) while the other wire is located at (12.0 cm, 0.0 cm). What is the magnitude of the magnetic force per unit length of the first wire on the second and the second wire on the first?
12.3 Exercise 3
Is constant in magnitude for points that lie on a magnetic field line?
12.3 Exercise 5
Two long, straight wires are parallel and 10 cm apart. One carries a current of 2.0 A, the other a current of 5.0 A. (a) If the two currents flow in opposite directions, what is the magnitude and direction of the force per unit length of one wire on the other? (b) What is the magnitude and direction of the force per unit length if the currents flow in the same direction?
Adapted from University Physics Volume 2 © 2016 Rice University. Licensed under CC BY 4.0. Source: University Physics Volume 2. Imported at revision db44eb9.