Showing the voltages in a transformer with a 220 winding primary coil and a 1 to 4 winding secondary coil. Showing that huge currents can be produced using transformers by melting a nail with a single winding secondary coil.

How transformers are used to create huge voltages and sparks from a 12V car battery. Includes a demonstration.

Showing the strength of the attraction between ferromagnetic materials and magnetic fields using a 15Kg metal bar which is sucked into the magnetic field of a solenoid. Illustrating the concept of ferromagnetic domains using an array of compass needles.

Hearing the domains in a ferromagnetic material flip by connecting an amplifier to a solenoid wrapped around the ferromagnetic material and then approaching it with a magnet.

Showing that an iron washer is no longer attracted to a magnet when heated above the Curie point for iron.

Showing that liquid oxygen, although paramagnetic, will be attracted to a strong magnet.

Showing that a current is induced in a coil of wire when a bar magnet is moved near or away from it.

Showing that a current will be induced in a loop of wire wrapped around a solenoid when a current is run through that solenoid. Also shows that the induced current increases when there are more loops wrapped around the solenoid.

Showing that different voltages can be measured across the same points in a circuit when there is an induced current through the circuit.

Showing that a current is induced in a coil of wire when it is rotated in the magnetic field of the earth.

A student tries to light up light bulbs with a hand powered generator. Also an example of a flashlight and a radio which each have a built in generator.

Definition of magnetic braking, with a demonstration of a copper pendulum swinging through a magnetic field.

Showing that a bulb connected to a coil of copper wire lights up when the coil is moved into or out of a magnetic field.

Showing that a conducting ring slows down as it is falling into or out of a magnetic field.

Showing the behavior of bar magnets, a conducting egg, and a conducting ring when placed in the magnetic field of a three phase generator.

Discussion of the secret top and how it works, with a repeat of the demo from a previous lecture.

Definition, with a demonstration of a coffee can rotating in the magnetic field of a two phase generator.

Using a superconductor to levitate a magnet, including a demo.

Running alternating current through a coil of wire above a conductor. Includes demonstration and levitation of a "woman."

Showing that a self-inductor will oppose the buildup of current using a circuit of light bulbs and a large inductor.

Hear the current reduction of high frequency audio due to a self-inductor. Cannot hear phase shift.

Levitating a conducting ring above a coil powered by an AC power supply.