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Electricity and Magnetism—
Electrostatics, continued
PHYSICS & PHYSICAL SCIENCE ELECTRICITY AND MAGNETISM
Metal Electroscope
The aluminum case has front and rear glass windows for easy viewing. The square
design keeps the foil leaves farther from the side of the electroscope and thus it is
less susceptible to erratic exterior static charges. The foil leaves only react to charges
that you intentionally place on the ball of the electroscope. Complete instructions
are provided.
Catalog No. Description Price/Each
AP5640 Metal Electroscope $49.95
Electroscope, Quantitative
Quantitatively measure electric charges with this easy-to-use electroscope. Study
insulators, conductors, and the photoelectric effect. The electroscope
works by inducing
a charge onto the zinc charging plate; the armature is then deflected by an amount
proportional to the induced charge. The face of the electroscope is scaled in 10-degree
increments in two quadrants for quick measurements. Complete instructions provided.
Catalog No. Description Price/Each
AP9228 Electroscope, Quantitative $39.90
ELECTRICITY AND MAGNETISM—ELECTROSTATICS continued on next page.
Faraday Cage
AP6480
Faraday Cage
Demonstrate why it is safe to stay in a car during a lightning storm. Place a
discharged flask form electroscope inside the metal cage. Bring an electrically
charged rod near the cage and the electroscope’s foil leaves don’t move. Charge
the cage by touching it with the charge rod and the foil leaves still don’t budge.
Why? The metal cage clearly shows that electric charges remain on the outside of
a conductive shell and don’t affect the inside. Includes cage with metal bases and
insulating stands, charging rod and instructions. Flask form electroscope is required
and available separately. Cage dimensions: 26.5 x 11.5 cm.
Catalog No. Description Price/Each
AP6480 Faraday Cage $31.40
AP7150 Flask Form Electroscope 22.35
Electroscope,
Quantitative
AP9228
Metal Electroscope
AP5640
Friction Rods and Friction Pads
Friction pads are used together with friction rods to produce static electricity in
varying amounts and charges.
Catalog No. Description Size Price/Each
AP9169 Hard Rubber Friction Rod 12" $ 7.00
AP9201 Lucite® Friction Rod 10" 4.38
AP9202 Hollow Glass Friction Rod 12" 5.60
AP9203 Solid Glass Friction Rod 10" 6.84
AP9204 Animal Fur Friction Pad, Large 9" x 11" 20.40
AP9206 Wool Friction Pad 6" x 6" 5.70
AP9207 Flannel Friction Pad 6" x 6" 3.35
AP9208 Silk Friction Pad 6" x 6" 4.85
Friction Rods and
Friction Pads
AP9169, etc.
Pith Balls
Better pith balls? Yes! Because our pith balls are made from durable polystyrene, they
give a better electrostatic performance even in humid conditions.
Catalog No. Description Price/Pkg.
AP4624 Pith Balls Without Threads $6.58/12
AP4625 Pith Balls With Threads 5.90/6
Pith Balls
AP4624, etc.
Coulomb’s Law
Apparatus
AP9227
Coulomb’s Law Apparatus
Apparatus includes a rugged wooden base, rigid fiberboard housing, parallax eliminating
mirror, metric scale, grid, hardboard and Lucite® tops, acetate and vinyl strips,
pith balls, fabric squares, monofilament, and polyethylene insulators. Complete
instructions provided.
Catalog No. Description Price/Each
AP9227 Coulomb’s Law Apparatus $55.95
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