5 Electricity & Magnetism

Jumping ring

Jumping ring

Catalog: 
5K20. POSSIBLE DUMMY 30A
Location: 
Da1
` Thompson type electromagnetism app

Electroscope in a cage

Electroscope in a cage

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

Braun electroscope

The Braus's electroscope. The needle deflects when a charge is near or touching

Braun electroscope

Catalog: 
5A22.10
Location: 
23-1
The vertical needle will rotate proportionate to the amount of charge placed at the top. Various accessories can be attached to the banana plug at the top; A flat plate, a conductive ball, and a Faraday ice pail can be connected. It can be back lit usin

Homopolar Motor

The screw and the magnet spins rapidly when the wire touches the neodymium magne

Homopolar Motor

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.

Magnet and iron filings

The iron filings are kept in the shaker bottles. The smaller bottle has a finer

Magnet and iron filings

Catalog: 
5H10.30A
Location: 
Cc2
Used with specially prepared overhead projectors, magnetic field lines are shown by sprinkling iron filings on top of glass plates which have magnets in various configurations attached underneath.

Tin Foil and wax paper Capacitor

A sheet of tin foil.

Tin Foil and wax paper Capacitor

Catalog: 
5C20.10D
Location: 
Ca1
With tin two tin foild sheets and a sheet of wax paper in the middle a simple capacitor is constructed.

Surface charge density

Surface charge density

Catalog: 
5B30.12
Location: 
23-3
Long closed cylindrical shape

Deflection of a stream of water

Fill the funnel with colored water.

Deflection of a stream of water

Catalog: 
5A40.40A
Location: 
9-1,21-1
A charged rod deflects a stream of water.

Back EMF Inductance Spark

When the touching alligator clips are pulled apart there is a big spark.

Back EMF Inductance 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.

Gold Leaf Electroscope

Gold Leaf Electroscope

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

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