Physics
Study of matter, energy, and their interactions in the universe.
Advanced Topics
Fields and Electromagnetism
What Are Fields?
A field is an invisible area that can push or pull objects. The most famous fields are gravity, electric, and magnetic fields.
Electromagnetism
Electricity and magnetism are two sides of the same coin! Moving electric charges create magnetic fields, and changing magnetic fields can make electricity flow.
Real-World Wonders
- Electromagnetic waves (like radio, microwaves, X-rays) help us communicate, cook, and see inside our bodies!
- Motors and generators use electromagnetism to run cars, appliances, and power plants.
The Power Equation
The strength of a force in a field can be calculated, but the key is that fields explain how objects interact at a distance, without touching.
Examples
A compass needle points north thanks to Earth's magnetic field.
Electric generators use magnets and wires to produce electricity.
In a Nutshell
Fields describe invisible forces like gravity and electromagnetism that shape our world and technology.