Meeting #11. T HE S ETUP Piece of Steel Magnet Copper Tube: Conductive Non-magnetic.
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T HE E XPERIMENT Video Link: demo-lenzs-law-with-copper-pipe-10268/http://video.mit.edu/watch/physics- demo-lenzs-law-with-copper-pipe-10268/ Extra Link: nslaw/ nslaw/
Transcript of Meeting #11. T HE S ETUP Piece of Steel Magnet Copper Tube: Conductive Non-magnetic.
Meeting #11
THE SETUP Piece of Steel Magnet Copper Tube:
Conductive Non-magnetic
THE EXPERIMENT Video Link:
http://video.mit.edu/watch/physics-demo-lenzs-law-with-copper-pipe-10268/
Extra Link: http://regentsprep.org/Regents/physics/phys08/clenslaw/
STEEL
Accelerates close to gravity
Air resistance is only upwards force (negligible)
MAGNET
MAGNET
Changing Magnetic Field
Induced Current
TO SUM IT UP The falling magnet induces a current within
the tube. By Lenz’s law, the current creates a magnetic
field that opposes the field of the falling magnet.
The magnet feels a resistive (upward) force, and falls slowly.
