Eddy Currents Concept

Demonstrations in Eddy Currents

Eddy current pendulum: solid copper plate (left) and slotted copper plate (right) hanging from rods on a horizontal crossbar, with two black radar magnets on the bench below
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Eddy Current Pendulum 1

Solid and slotted conducting plates swing through magnetic fields simultaneously. The solid plate stops almost immediately due to eddy current damping; the slotted plate swings freely. A striking demonstration of …
Copper plank inclined on a wooden block, with a cylindrical magnet and stainless steel cylinder at the top and a clear plastic catch box at the bottom
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Eddy Current Braking

Students observe Lenz's law in action: a rare-earth magnet rolls at constant (very slow) velocity down a copper ramp while a non-magnetic cylinder accelerates normally. A second configuration shows a …
Two copper tubes on a green surface — one with viewing holes drilled along its length — alongside a penny and a small gold-colored neodymium disk magnet
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Eddy Currents: Copper Tube

A neodymium magnet falls slowly through a copper tube (~10 seconds for 61 cm) while pennies drop in under a second, dramatically demonstrating Lenz's law and eddy current braking.
Jumping ring apparatus with copper solenoid coil wound around a white insulating column, mounted between clear acrylic plates with threaded rods. Four rings displayed at the base: aluminum ring with slit, thick copper ring, and solid aluminum ring
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Jumping Ring 1

Demonstrates Faraday's Law, Lenz's Law, and eddy currents. AC current through a solenoid induces currents in conducting rings that create opposing magnetic fields, launching the rings upward. Comparing solid vs. …
Crushing coil wrapped in fiberglass and tape atop the apparatus, surrounded by several crushed Pepsi cans showing various degrees of compression
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Electromagnetic Can Crusher

A high-voltage capacitor discharge through a coil induces powerful eddy currents in an aluminum can. By Lenz's law, the induced currents repel the coil's field with enough force to crush …