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Science

Igel

(36,981 posts)

4. My students always stare when I pull Lenz's law out of the air for a demo

Reply to sl8 (Reply #3)

Sun Sep 29, 2024, 03:55 PM

Sep 2024

when we start E&M--it doesn't happen often, but they stare and try to sort out what the "trick" is. It's right at the end of the course.

Then we do the formal physics and they pull out their hair. (It's high school, AP Physics C: E&M. Don't always have enough students--or, apparently, this year, budget--to have the class.)

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Bismuth is so strongly repelled from magnets, it levitates. How? [View all] Judi Lynn Sep 2024 OP

Aluminum is paramagnetic but will still levitate. duncang Sep 2024 #1

In that case, the repulsion is due to the opposing magnetic field formed by current flow induced in the aluminum. sl8 Sep 2024 #3

My students always stare when I pull Lenz's law out of the air for a demo Igel Sep 2024 #4

Moved post. nt sl8 Sep 2024 #2