Describe basic electrical theory.

Description should include

• atomic structure, as it relates to electricity
• the law of charges
• the differences among conductors, insulators, and semiconductors
• current, including its unit of measure and symbol
• voltage, including its unit of measure and symbol
• resistance, including its unit of measure and symbol
• the interrelationship of current, voltage, and resistance
• potential and electromotive force
• Ohm's law
• Watt’s law.

IRC: Chapter 34 Links to an external site. covers electrical code related to residential construction (throughout Chapters 34 to 43 and all aspects of voltage, ohms and watts, are discussed as they relate to aspects of residential electrical installation).

Process/Skill Questions:

• Who is credited with discovering the law of charges?
• How should objects with similar charges behave, according to the law of charges?
• What letter symbol is used to represent current?
• What letter symbol is used to represent voltage?
• What letter symbol is used to represent resistance?
• How does resistance affect the movement of free electrons?
• What are the mathematical relationships of Ohm’s law?