IMG-20241209-WA0001.jpeg

# Cell and Electrical Energy This document discusses cells, electrical energy, and current. ## How does a cell provide energy? - **Energy:** The ability to do work. - **Work:** Occurs when a force acts on an object and moves it some distance. - **Chemical Energy:** Cells convert chemical energy i...

# Cell and Electrical Energy This document discusses cells, electrical energy, and current. ## How does a cell provide energy? - **Energy:** The ability to do work. - **Work:** Occurs when a force acts on an object and moves it some distance. - **Chemical Energy:** Cells convert chemical energy into other forms of energy. - **Electrical Energy:** Cells move charges to separate them, storing energy. - **Electrical Potential Difference:** The amount of energy it takes to move one unit of charge from one terminal (cathode) to another (anode) in a cell. - It is also called voltage or potential difference. - It is measured in volts. - Measured as the **difference** in electrical potential. ## Different Types of Outlets - **Electrical outlets:** Rated according to the electrical potential difference. - **Household outlets:** In Canada and the USA, most are 120V. Other types exist for larger appliances. ## Electric Current - **Current:** The movement of charges (rate of flow of charges past a point) in a circuit. - **Direct Current (DC):** Current flows in a single direction from a cell to another. - **Alternating Current (Alternating Current (AC)):** Current that moves back and forth, alternating in direction. - **Unit of Current:** Amperes (A). - **Smaller Unit:** Milliampere (mA); 1A = 1000mA.