PHYS 2002 Lecture : Lecture 10
Document Summary
Magnetism has been observed since roughly 800 b. c. g y g. Certain rocks on the greek peninsula of magnesia were noticed to attract and repel one another. So just like charged objects, magnetized objects can exert forces on each other repulsive or attractive. h th l i t f tt ti. A magnet has two poles, a north and a south: Similar to electric charges, but magnetic poles always come in pairs. They never exist as a single pole called a magnetic monopole. We get two magnets, each with two poles! Electric charges produce electric fields and magnets produce magnetic fields. We used a small positive charge (test charge) to determine what the electric field lines looked like around a point charge. We can use a small magnet called a compass! The compass needle is free to pivot, and its tip (the north pole) will point toward the south pole of another magnet.
