Magnetism
Magnetism is a fundamental physical phenomenon produced by the motion of electric charges, resulting in attractive and repulsive forces between objects. It is characterized by the ability of certain materials to attract or repel other materials.
The Process of Making a Magnet
A material becomes a magnet when it can attract other metallic objects, particularly those made of ferrous materials (iron, cobalt, and nickel).
Types of Magnets
- Permanent Magnets
- Examples: Bar magnet
- Characteristics: Retain their magnetic properties over time without the need for an external power source.
- Temporary Magnets
- Examples: Electromagnets
- Characteristics: Act as magnets only while an electric current is flowing through them. Their magnetism is lost once the current ceases.