OCR Physics Magnetism Revision Notes

• 1Magnets have two poles: north and south.
• 2Like poles repel each other, while opposite poles attract.
• 3Magnetic fields are represented by field lines, which indicate the direction and strength of the field.
• 4Electromagnetism combines electric currents and magnetic fields, leading to applications like electric motors.
• 5The Earth's magnetic field protects us from solar radiation and is essential for navigation.

Magnetism is the force that makes magnets attract or repel each other. Every magnet has a north and a south pole, and when you bring two magnets close, they either pull together or push apart depending on their poles. This force is created by magnetic fields, which are invisible areas around the magnet. Understanding magnetism helps us use it in technology, like in motors and compasses.