3 things to know for Magnetism
1) Right Hand Rules. Know the various forms and applications of these rules, they are vital to figuring out how to approach many problems.
2) Ampere's and Biot Savart's laws: These two laws enable you to attack a variety of problems with a variety of givens and be flexible in your problem solving.
3)Don't forget electricity: From what I've seen, the tough problems like to bring in electric fields and other topics from electricity to change things up and make you think. Stay fresh on electricity!
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