Explore the theory of electromotive force (voltage).

Exploration should include

• the definition of voltage
• the measurement of voltage, using a voltmeter
• measurement of potential difference (electromotive force), using a voltmeter for direct current (DC) power sources
• the calculation of voltage, using Ohm's law.

Process/Skill Questions:

• How is measurement of potential difference determined?
• What formula is used to calculate voltage if current and resistance are known?
• How is a voltmeter used to measure voltage across a resistor in a series circuit?