Magnet

1. Attracts magnetic materials
2. Has poles (north pole and south pole)
3. Like poles repel, unlike poles attracts
4. Freely suspended agnet shows north-south direction

• The area around the magnet with magnetic force is magnetic field

• Begin from north pole to south pole
• Closer to another where the magnetic field is stronger
• Lines never meet or cross

Electromagnet

• Electromagnet is a type of magnet that has temporary magnetic effect when electric current flows through it

• The pattern of the magnetic field depends on the conductor used
• The direction of the magnetic field is determined by the direction of the electric current
• The right hand grip rule determines the direction of the magnetic field

Application of Magnets and Electromagnets in Daily Life

1. The needle of a compass uses a magnet to show the direction of the poles
2. Credit cards and debit cards have an electromagnetic strip that stores information
3. The magnetic lock on doors uses an electromagnet to lock the doors automatically