Describe voltage, including its unit of measurement and symbol(s).

Description should include

• defining voltage as the potential difference in charge between two points in an electrical field used to push the electrons through the circuit
• identifying that voltage is always expressed between two points in an electrical field
• identifying that the unit of voltage is measured in volts (Volts)
• identifying the symbols for voltage (V) and (E). 

Process/Skill Questions:

• What is the unit of measurement for voltage?
• What letter symbols are used to represent voltage?
• What are some alternative voltage sources?