Science of Technology

Electrical Energy

• Electricity can be measured on scales of voltage, current, and power, which are related but different concepts.
• Ohm's Law describes the relationship between voltage, current, and resistance in an electrical circuit.

Topics

• Electrical energy can be produced in a variety of ways.
• Energy is a quantity that can be wasted, but never destroyed.
• Voltage and current are different.
• Energy can be transformed at different rates; this rate is known as power.
• Alternating current can be transformed to higher or lower voltages.