5 Electricity & Magnetism

Rods, fur and silk

Rabbits fur and acrylic rod, rubber rod and silk. The hair dryer is to dry out t
Catalog: 
5A10.10A
Location: 
21-1
Fur, silk and rods

Homopolar Motor

The screw and the magnet spins rapidly when the wire touches the neodymium magne
Catalog: 
5H40.53
Location: 
Cd2
The electric current produced by the battery moves radially through the magnet which has a magnetic field along its longitudinal axis. The resulting Lorentz force in the tangential direction produces a torque in the magnet making the magnet with the attached screw to rotate. In contrast to other electrical motors, both the orientation and magnitude of the magnetic field and the electric current do not change.

Gold Leaf Electroscope

Catalog: 
5A22.30
Location: 
21-3
Gold leaf electroscope

Radar Magnet

The aluminum bar and brace are used with a twist to remove the keeper. The first
Catalog: 
5G10.10A
Location: 
Do3
Powerful permanent magnet.

Electroscope in a cage

Catalog: 
5B20.30A
Location: 
23-3
Faraday's electroscope in a cage

Scotch Tape Electrostatics

The dowel is color coded red and green. The tape is color coded with a wet erase
Catalog: 
5A10.151
Location: 
Scotch tape is used to demonstrate electrostatic principles.

Back EMF Inductance Spark

When the touching alligator clips are pulled apart there is a big spark.
Catalog: 
5J10.20A
Location: 
A current of 10 to 20 amps flows through the wire when the alligator clips are touching. There is an internal resistance of about half and ohm. When the wires are pulled apart a big spark occurs.

Levitation Using Permanent Magnets

The many parts to the Levitron demo are shown here.
Catalog: 
5H20.20C
Location: 
Cc4
A spinning magnet made by Levitron levitates over a permanent magnet.

Neodymium Coated Magnet

Magnet on a 2 Kg mass.
Catalog: 
5G10.10C
Location: 
Cb3
Neodymium Coated Magnet with 6 Kg of lift.

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