392 1-800-452-1261
Electricity and Magnetism—
Electrostatics, continued
Flask Form Electroscope
By: The Flinn Staff
Ready to use! Simply hang two pieces of foil from
the hook and insert into the flask. Includes Teacher Notes, a reproducible student
worksheet, electroscope assembly, and flask.
Catalog No. Description Price/Each
AP7150 Flask Form Electroscope $24.03
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 $51.95
Electroscope, Quantitative
Quantitatively measure electric charges with this easy-to-use electroscope. Study
insulators, conductors, and the photoelectric effect. The elec tro scope 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 $42.89
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 $32.66
AP7150 Flask Form Electroscope 24.03
Electroscope,
Quantitative
AP9228
Metal Electroscope
AP5640
Photoelectric Effect Demonstration See page 393.
Electroscope Without Flask
Insert this simple device into the top of a 250-mL Erlenmeyer flask and you instantly
have a flask form electroscope. Start charging the ball terminal by contact or induction
and watch the foil leaves respond. Flask sold separately.
Catalog No. Description Price/Each
AP4631 Electroscope Without Flask $16.18
GP3045 Flask, Erlenmeyer 5.50
Pith Ball Electroscope
It’s magic! Students love to see pith balls be repulsed and attracted during your electrostatic
magic show. You will remove the magic, however, as your students develop
an understanding of the electrostatic principles involved. Two pith balls included.
Catalog No. Description Price/Each
AP5639 Pith Ball Electroscope $19.24
Flask Form Electroscope
AP7150
Electroscope Without Flask
AP4631
Pith Ball Electroscope
AP5639
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