22.10 Magnetic Force between Two Parallel Conductors
Two wires each sitting in the other's field, attracting when currents run together and repelling when opposed, which fixes the ampere.
College Physics 2e, 22.10 Magnetic Force between Two Parallel Conductors
4 exercises
22.10 Exercise 1
Two parallel wires carry equal currents in the same direction and are separated by a small distance. What is the direction of the magnetic force exerted by the two wires on each other?
- No force since the wires are parallel.
- No force since the currents are in the same direction.
- The force is attractive.
- The force is repulsive.
22.10 Exercise 9
(a) The hot and neutral wires supplying DC power to a light-rail commuter train carry 800 A and are separated by 75.0 cm. What is the magnitude and direction of the force between 50.0 m of these wires? (b) Discuss the practical consequences of this force, if any.
22.10 Exercise 11
A 2.50-m segment of wire supplying current to the motor of a submerged submarine carries 1000 A and feels a 4.00-N repulsive force from a parallel wire 5.00 cm away. What is the direction and magnitude of the current in the other wire?
22.10 Exercise 13
An AC appliance cord has its hot and neutral wires separated by 3.00 mm and carries a 5.00-A current. (a) What is the average force per meter between the wires in the cord? (b) What is the maximum force per meter between the wires? (c) Are the forces attractive or repulsive? (d) Do appliance cords need any special design features to compensate for these forces?
Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.