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INDEX E1 : ELECTROSTATICS

E1.01 TWO TYPES OF CHARGE - PITH BALLS

Uses pith balls to show there are two types of static charge and opposites attract while like charges repell.

E1.02 TWO TYPES OF CHARGE - ELECTROSCOPE

Uses a leaf electroscope to show there are two types of static charge.

E1.03 DIPOLE - POLARIZATION MODEL

Two balls on a rod represent a dipole. The rod can be rotated for different alignments.

E1.04 GAUSSIAN COFFEE CANS

Coffee cans with a rod through the center serve as visual aids when discussing Gauss's Law.

E1.05 POTENTIAL MODEL

A wooden model of the electrostatic potential resulting from two positive and one negative charges.

E1.06 RUBBER SHEET POTENTIAL

A stretched rubber sheet models electrostatic potential.

E1.07 OBEDIENT RULER

A meter stick is mounted to pivot about its midpoint. As a charged rod is brought near, the stick follows it.

E1.08 POLAR WATER

A charged rod deflects a stream of water.

E1.09 INDUCTION : TWO CHARGES FROM ONE

A charged conductor is brought near two uncharged touching conductors. When the touching conductors are separated and the charged conductor is removed, they are oppositely charged.

E1.10 FARADAY'S ICE PAIL

The ice pail is connected to the electroscope. When a charged ball is lowered into the pail without touching the pail, the electroscope deflects.

E1.11 ELECTRIC FIELD LINES

For use on the overhead projector. Shows the field lines produced by a single point, two like charges, two unlike charges, two oppositely charged plates, and a hollow conductor.

E1.12 HOLLOW SPHERE

A hollow conductor is charged. Attempts are made to remove charge from the inside surface, but the electroscope does not deflect.

E1.13 ASYMMETRIC CONDUCTOR

Investigate the distribution of charge about an asymmetric conductor.

E1.14 PITH BALLS INSIDE A CYLINDER

Charged is applied to a cylinder, but the pith balls inside do not deflect.

E1.15 RADIO IN A FARADAY CAGE

When a Faraday cage is lowered over a radio, silence results.

E1.16 VAN DE GRAAFF GENERATOR

A machine that produces high electrostatic potential.

E1.17 VAN DE GRAAFF AND WIG

A wig on the Van de Graaff shows that like charges repel.

E1.18 ELECTRIC WHIRL

When connected to a high voltage source, the points move backwards, regardless of the sign of the charge.

E1.19 STYROFOAM SHOWER

A plastic dish of styrofoam peanuts is placed atop the Van de Graaff generator, and peanuts fly everywhere. When a metal can is used, the peanuts stay put.

E1.20 FARADAY CAGE

A victim is placed inside a large Faraday cage which is then charged by the Van der Graaf generator. Sparks can be drawn from the cage, but the person inside feels no ill effects.

E1.21 WIMSHURST MACHINE

Another means of producing high voltages.

E1.22 ELECTROSTATIC PING PONG

A glass tube with a pith ball inside is placed between the terminals of the Wimshurst machine. When the handle is turned, the ball oscillates between the terminals.

E1.23 WASSERPLOPPER (Kelvin Water Dropper)

Static electricity is produced by water drops falling through metal rings. WARNING: Very susceptible to humidity effects.

E1.24 TYPES OF CAPACITORS

Various capacitors as props.

E1.25 BIG SPARK

A large capacitor is discharged by laying a screwdriver across its terminals, producing a big spark and a loud noise. Good for waking up a sleepy class.

E1.26 DISSECTIBLE LEYDEN JAR

A Leyden jar is charged and then disassembled. In the disassembled state there is no discharge. When reassembled, a spark is released upon discharge.

E1.27 PARALLEL PLATE CAPACITOR

Investigates the effect of plate separation.

E1.28 DIELECTRICS

Different dielectrics are placed between the plates of a capacitor.

E1.29 ELECTROSTATIC PRECIPITATOR

Clears smoke from a chamber; electrons drifting from cathode to anode carry smoke particles to the anode.

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