Homework for Tuesday: Read p. 424-430. P. 430#3-7
Thursday's exam is now moved to Monday, March 5th.
On Friday we had a quiz that ended up taking the majority of class. You graded your own (only had a few dishonest people...) and it was only 7 points. I will be handing those back tomorrow since I am waiting for a few to make theirs up after school today or before tomorrow (absences).
Today we made headway on notes involving magnetism (I posted online last week) - we discussed why/what things are magnetic (electron spins in some metals), how temporary magnets come to be, where magnetic field lines go (similar to electric field lines), and that charges in motion (electric current) makes a magnetic field, and tested this out with a compass while learning a basic right hand rule for magnetic field around a current carrying wire.
The Right Hand Rule:
1. visualize grabbing wire of interest with your right hand.
2. Your thumb must point to the (-) post of the battery (or that part of the circuit)
3. Fingers wrap around wire and show direction of magnetic field (N follows field lines)
Tomorrow we'll try to apply the right hand rule to making some electromagnets and predicting their poles.
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