The document discusses several laws and concepts related to magnetism. It states that like poles of magnets repel each other, while unlike poles attract. A compass arrow points to magnetic north. Induced magnetism explains how magnetic materials can become magnetized when placed near a magnet due to magnetic induction. A magnetic field is the region around a magnet where its magnetic effects can be detected, with field lines running from the north to south pole. Permanent magnets made of steel retain their magnetism while temporary magnets made of iron lose theirs over time.

1. Magnetism Revision

2. Law of Magnetism Like poles repel Unlike poles attract

3. Law of Magnetism Like poles repel Unlike poles attract If a magnet repels an object, that object is a magnet. If a magnet attracts an object, the object might be a magnetic material OR Magnet .

4. Compass The arrow of the compass is the North Pole

5. Compass The arrow of the compass is the North Pole S N

6. Induced Magnetism Explains how a magnet attracts a magnetic material Magnetic induction is a process in which, an magnetic material is magnetized when placed in a magnetic field. There must be induction before an magnetic object is attracted to an magnet

7. Magnetic Field A region in which the magnetic effect is felt The direction of the magnetic field lines is from North pole to South Pole.

8. Magnetic Field

9. Permanent /Temporary Magnet Permanent Magnet (made up of steel) retain magnetism. Used in compass and door latch Temporary Magnet (made up of iron) loses magnetism. Used in electromagnet.