Magnetic Field

A magnetic field is a region around a magnetic material or a moving electric charge within which the force of magnetism acts. It is a fundamental property of magnets and moving electric charges and is responsible for the magnetic force experienced by other magnets and moving charges.

Magnetic Field Lines

Magnetic field lines are a visual way to represent the strength and direction of a magnetic field. They are directed from the north pole to the south pole of a magnet and are closer together where the magnetic field is stronger.

Magnetic Field Strength

The strength of a magnetic field is measured in units of tesla (T) or gauss (G). One tesla is equal to 10,000 gauss. The strength of a magnetic field decreases with distance from the source, following the inverse square law.

Applications of Magnetic Fields

Magnetic fields have various applications in everyday life and technology. They are used in electric motors, generators, MRI machines, and magnetic compasses, among other devices.

Study Guide

1. What is a magnetic field?
2. How are magnetic field lines oriented around a magnet?
3. What are the units of measurement for magnetic field strength?
4. Explain the applications of magnetic fields in technology.