Powering Our World

Electromagnetism is the branch of physics that studies electric forces, magnetic fields, and how they work together. It’s the reason we have electricity in our homes, computers, and even Wi-Fi!

Key Concepts

• Electric Charge: The property of matter that causes it to experience a force in an electric field.
• Electric Fields & Circuits: How charges create fields and how electricity flows in wires.
• Magnetism: How moving charges create magnetic fields and how magnets interact.

Real-World Connections

From charging your phone to using a credit card, electromagnetism is everywhere. It explains lightning, magnetic levitation trains, and how speakers produce sound.

Basic Equation

Ohm’s Law relates voltage, current, and resistance:

\[ V = IR \]

Where \( V \) is voltage, \( I \) is current, and \( R \) is resistance.