Magnets and Electromagnets Magnets exert forces at a distance on magnetic materials like iron and steel Magnets pull and push other magnets N-N repel S-S repel N-S attract A coil of wire carrying a current is called an electromagnet It makes a magnetic field just like a bar magnet which is stronger at the ends Reversing the current reverses the poles at the ends

Electromagnets The strength of the electromagnet can be increased by: More turns of the coil Using an iron core Increasing the size of the current

The Circuit Breaker Explain how the circuit breaker works by arranging the statements in the correct order. Extra: The Electric Bell

Uses of Electromagnets In scrap yards and factories Electric buzzers Electric bells Relay switches Circuit breakers