PASCO ES-9060 Charge, Equipotential and Field Mapper - Manual (Page 20)

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Model No. ES-9060 Charge, Equipotential, and Field Mapper
19
Questions:
a) Why is the charge density different on the inside versus the outside
of the cylinder?
b) Why does the charge density change as one goes from the middle of
the inside surface towards the rim?
c) What is the charge density of an infinitely long cylinder?
Experiment 2: Charge Density on a Cone
Procedure:
1. Connect the Electrometer, outer shield of the Faraday Ice Pail, and
Electrostatics Voltage Source to a common earth ground. Follow the
setup in Figure 2.0. Connect the black lead over the edge of the shield
and the red lead over the edge of the Ice Pail. Connect the voltage
source to the same earth ground as the shield and the electrometer.
WARNING: To avoid the risk of shock or electrical injury,
always ground your equipment and yourself. Before proceeding,
follow the setup in Figure 2.0 and instructions in step 1. To ground
yourself, keep one hand on the upper edge of the shield of the Faraday
Ice Pail or on the earth-ground lead.
Equipment Required:
Charge Mapping Apparatus (ES-9060) Electrometer (ES-9078)
Proof Plane (ES-9057B) Electrostatic Voltage Source (ES-9077)
Faraday Ice Pail (ES-9042A)
Figure 2.0: Experiment Setup with Cone Setup
Cone
Electrometer
Ice Pail
Power supply
black lead
red lead
Proof Plane
2000 V
shield
to COM port