Glossary of Key Terms

Here is a list of some important words and phrases used throughout this book to help you better understand and navigate the world of electricity.

• **Electricity**: the flow or movement of electric charges through a conductor, such as a wire
• **Circuit**: a closed loop or path through which electricity can flow
• **Conductor**: a material that allows electricity to easily pass through it
• **Insulator**: a material that does not allow electricity to pass through it easily
• **Voltage**: the measure of electrical potential or force that pushes electric charges through a circuit
• **Current**: the amount of electric charge flowing through a circuit
• **Resistance**: the opposition to the flow of electricity in a circuit
• **AC**: alternating current, a type of electricity that constantly changes direction
• **DC**: direct current, a type of electricity that flows in one direction
• **Circuit breaker**: a safety device that automatically stops the flow of electricity when there is an overload or short circuit
• **Electromagnet**: a type of magnet created by the flow of electricity through a coil of wire
• **Transformer**: a device that changes the voltage of an electric current
• **Grounding**: connecting an electrical circuit to the ground for safety purposes
• **Ohm's Law**: a mathematical relationship that describes the relationship between voltage, current, and resistance in a circuit
• **Watt**: a unit of measurement for power, which is the rate of using or producing energy
• **Ampere**: a unit of measurement for electric current
• **Volt**: a unit of measurement for voltage
• **Joule**: a unit of measurement for energy or work
• **Power grid**: a system of interconnected power sources, transmission lines, and distribution networks used to deliver electricity to homes and businesses

Remember, don't be afraid to refer back to this glossary whenever you come across a word or phrase you don't understand. Understanding these key terms will help you on your journey to becoming an electrical expert. Happy reading!