Today we made our pennies into electromagnets! Not as cool as it sounds, I know, but still neat to see that any conductor may act like a magnet when a magnetic field nearby is moved or strengthened/weakened - relates to tonight's homework about the current in a generator when a magnet is not moving next to it.... this is zero; the magnet and coil of wire must move relative to one another for the coil to have induced electric current.
After the pennies were moved with moving magnets, we experimented with Iron (Fe) filings and magnets, watched some cool laserdisc videos, and made some cool DC motors with a magnet, a nail, a battery, and a piece of wire (show your family!) You can change the direction it moves in two ways.... ?
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