Barbering Exam Review Ch.8 Basics of Electricity | Latest Version | 2024/2025 | Rated A+

Barbering Exam Review Ch.8 Basics of Electricity | Latest Version | 2024/2025 | Rated A+ What is the basic unit of electricity? The basic unit of electricity is the "ampere," which measures the flow of electric current. What is a circuit? A circuit is a closed path that allows electricity to flow through it, enabling electrical devices to function. What is the difference between a conductor and an insulator? A conductor allows electricity to flow freely, while an insulator resists the flow of electricity. What does a volt measure? A volt measures the pressure or force of the electrical current that pushes electrons through a conductor. 2 What is an electrical current? An electrical current is the flow of electrons through a conductor, typically measured in amperes. What is the role of a fuse in an electrical system? A fuse is a safety device that protects electrical circuits by breaking the circuit if the current becomes too high, preventing damage or fire. What is the purpose of grounding in electrical systems? Grounding provides a safe path for electricity to flow into the earth in case of a fault, preventing electrical shocks and fires. What is the difference between alternating current (AC) and direct current (DC)? Alternating current (AC) changes direction periodically, while direct current (DC) flows in one direction only. What is Ohm's Law? Ohm's Law states that the current (I) in a circuit is equal to the voltage (V) divided by the resistance (R), or I = V/R. 3 What is resistance in an electrical circuit? Resistance is the opposition to the flow of electric current, typically measured in ohms. What is the function of a transformer? A transformer is used to change the voltage of an electrical current, either stepping it up or stepping it down. What does the term "watt" measure in electricity? A watt measures the rate at which electrical