PURPOSE: To demonstrate that the voltage across a capacitor is proportional to the plate separation.
DESCRIPTION: The parallel plate capacitor is charged to 1200 Volts using a chain of 300 Volt batteries, and the battery lead removed. (A series resistor limits the current from the batteries.) The plates may then be separated and the voltage observed using the electrometer, demonstrating that the voltage is proportional to the plate separation.
SUGGESTIONS:
REFERENCES: (PIRA 5C10.20)
EQUIPMENT: Parallel plate capacitor assembly with electrometer as photographed.
SETUP TIME: None.
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