Background Information for the Photoelectric Effect

Using a Multimeter to Determine the Direction of Electron Current in a Circuit	A multimeter and a battery are used to show how positive and negative multimeter readings indicate the direction of electron current in a circuit.
Using a Multimeter to Identify Positive/Negative Charge	The sign of the charge on an electrophorus is identified using a multimeter.
Charging an Electrophorus and Electroscope by Induction	A conductor can be charged by induction, without contact.
Charging an Electroscope by Contact	Charging an electroscope by contact is demonstrated.
Discharging an Electroscope by Contact	Discharging an electroscope by contact is demonstrated.

This section provides background information about the apparatus used for the photoelectric effect demonstration.