Political Science 1020E Lecture Notes - Lecture 21: The Motor, Kilogram, Michael Faraday

• School: Western University
• Department: Political Science
• Course: Political Science 1020E
• Professor: Nigmendra Narain

Document Summary

In the previous lesson we learned that when a charged particle is injected into an external magnetic field, the charge experiences a force which is perpendicular to the particle"s line of motion. The same effect occurs when a current carrying wire is placed in an external magnetic field. The induced magnetic field around the current carrying wire interacts with the external magnetic field resulting in a force. external magnetic field cross sectional view of a wire with conventional current flowing into the page. To find the direction of the force between a current carrying wire and an external field, we use the 3rd hand rule that we learned about in lesson. The fingers point in the direction of the external magnetic field (b). The thumb points in the direction of the current (right hand) or thumb (left) electron flow (left hand). The palm indicates the direction of the force on the wire (f). fingers (into the page) palm.