ELECTRICITY
::
125
Pith balls
These 12 mm diameter balls of expanded polystyrene is
4407.00
used for demonstration experiments with electrical char-
ge. Supplied in a plastic box with 10 ea.
4400.00 Pith balls
Insulated rod with hook
This rod is used for supporting the pith balls at some
distance away from the hand when doing demonstration
experiments with electrical charges and fields.
4450.00 Insulated rod with hook
4400.00
Pith ball support
This support is supplied with a hook for conveniently hol-
ding a pair of pith balls connected by a string. Manu -
factured of nickel-plated brass with a plastic support
base. Height: 220 mm. Support base: 100 x 70 mm.
4407.00 Pith ball support
4450.00
Faraday ice pail
Used in conjunction with e.g. electroscope no. 4410.00,
4428.00 for the demonstration of load distribution on hollow
metal bodies. Dimensions: Diameter 50 mm, length 97
mm. Provided with 4 mm plug pins.
4425.00 Faraday ice pail
Conducting sphere
4425.00
For experiments in electrostatics e.g. examining the
capacitance of a body, this item is useful. Sphere dia-
meter: 68 mm. Provided with a 4 mm diameter jack for
mounting on the insulated rod no. 4410.02.
4410.03
4428.00 Conducting sphere, 68 mm diameter
Insulated rod
This item is good for insulated mounting of capacitor
plates and conducting spheres when doing electrostati-
cs experiments. The rod is providede with a 4 mm dia-
meter hole to receive 4 mm jacks and connection
bushings for laboratory safety leads.
Size: 145 mm x 10 mm diameter.
4410.02 Insulated rod
Zinc plate
4410.02
This is used along with the electroscope no. 4410.00 for
demonstrating the photoelectric effect. If the zinc plate is
negatively charged and then illuminated by a UV light
source e.g. UV mercury lamp no. 2865.00, then the
electrometer will show how the plate discharges as
electrons are removed by incident photons. (For best
results lightly polish the zinc plate surface using fine
steel wool.)
4410.03 Zinc plate
®
Science Equipment for Education Physics
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