PHYS 102 Lecture Notes - Lecture 20: Electromagnet

• School: McGill University
• Department: Physics
• Course: PHYS 102
• Professor: Nikolaos Provatas

Document Summary

It points away from north pole and goes towards the south pole. The magnetic field is denser towards poles of magnet than towards center. Current carrying wire segment creates magnetic field b around it. It"s magnitude is the same at any radius are away from the wire axis, and gets , and stronger as you move toward the wire axis. Direction of b is tangent to any circle at a radius. The b field lines that go out one end, around the loop and into the other end. It is an electromagnet with a north and south pole similar to a bar magnet. Magnitude of magnetic force on a current carrying wire segment placed in an external magnetic field b is proportional to: The angle between the external magnetic field and the current. The length of the segment running through the b external field.