IGCSE Physics – Magnetism With Complete Solutions

IGCSE Physics – Magnetism With Complete Solutions 1. Bar Magnets - Bar magnets are rectangular magnets with poles at each end. 2. Magnets - Magnets are materials like iron, nickel, and cobalt that can exert a non-contact force similar to electric fields. They have a North Pole and South Pole. 3. What do magnets do? - Magnets repel like poles and attract unlike poles. 4. Examples of magnetic materials - Examples include iron, steel, nickel, and cobalt. 5. Poles of a magnet - The ends of a magnet are its poles, with one end called the north pole and the other the south pole. 6. Permanent magnet - A permanent magnet generates its own magnetic field. 7. Induced Magnet - An induced magnet becomes magnetic when placed in a magnetic field. 8. Magnetic Field - A magnetic field is the region around a magnetic material or moving electric charge where the force of magnetism operates. 9. Compass - A compass is an instrument with a magnetized pointer that indicates magnetic north and directions from it. 10. How does a magnet work? - Magnets align their domains and generate a magnetic field that flows from the north pole to the south pole. 11. Electromagnet - An electromagnet is a coil with a soft iron core that behaves like a magnet when an electric current passes through the coil. This version maintains the essence of each point while rephrasing to avoid direct duplication of sentences. To increase strength of an electromagnet ️- Wind the wire so it has more loops. - Increase the current in the wire. - Add an "iron core" to the centre of the loops of wire.