Notes from today and yesterday combined here
Today we reviewed the phenomena we experienced yesterday; specifically being able to influence a neutral object by bringing a charged object near but not even touching it. The reason for this: Induction - when the charges within a conductor move around as a result of another electric field.
Induction is only responsible for attraction, not repulsion, between two objects. Therefore if you see two items attract, it could be due to opposite charges OR induction of one object.
On the other hand, if you see repulsion, then you are sure the charges are the same.
We bent streams of water today and induced charges on aluminum cans and pith balls again, and discussed/diagrammed what we think is going on in each situation in the notes.
Finally, class ended with some time to explore and a demonstration of the Wimshurst induction generator. More with this guy next week!
HMWK for monday: read 392-399; p. 399#1-7. #7 is review - you can do it using your 1st semester knowledge!!!!!
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