Electricity and Magnetism

Electromagnetic Induction

Eddy currents: Juming rings

Used to illustrate that the induced EMF depends on the conductivity of the object. In other words, it depends on the material and the shape.

APPARATUS:	LOCATION:
Ring launcher	O1
Rings	O1
Lamp	O1

Place different types of rings on the ring launcher. Watch how high each ring jumps. If you put rings in liquid nitrogen, the conductivity increases and it jumps higher. Also, show that the lamp lights up due to the induced current in the wire.