22.9 Magnetic Fields Produced by Currents: Ampere’s Law
Currents as the source rather than the target of fields: circular loops around a straight wire, coils, solenoids, and right hand rule 2.
College Physics 2e, 22.9 Magnetic Fields Produced by Currents: Ampere’s Law
2 exercises
22.9 Exercise 1
An experimentalist fires a beam of electrons, creating a visible path in the air that can be measured. The beam is fired along a direction parallel to a current-carrying wire, and the electrons travel in a circular path in response to the wire’s magnetic field. Assuming the mass and charge of the electrons is known, what quantities would you need to measure in order to deduce the current in the wi…
22.9 Exercise 3
In terms of the direction of force, we use the left-hand rule. Pointing your thumb in the +x-direction with the velocity and fingers of the left hand into the page reveals that the magnetic force points down toward the bottom of the page in the –y-direction.
A wire along the y-axis carries current in the +y-direction. In what direction is the magnetic field at a point on the +x-axis near the wire?
…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.