1001 Space Earth Nature History Human World Science and Technology Chemistry Materials Force and Energy Heat and Light Electricity and Magnetism Industry Machines Electronics and Computers Cars and Trucks Railways Ships Aircraft Fishing and Agriculture Undersea Exploration

Choose a Page:Why does a compass needle point north?What is a magnetic field?What is an electric current?How does an electromagnet work?*How does an electric bell work?*How are items electroplated?How can you make an electric current?What is static electricity?How is solar power used?What is lightning?What has been the most important e...Who built the first electrical gen...How does an electric motor work? How does an electric bell work? An electric bell contains an electromagnet, consisting of coils of insulated wire wound round iron rods. When an electric current flows through the coils, the rods become magnetic and attract a piece of iron attached to a clapper. The clapper hits the bell and makes it ring. An electric bell's electromagnet is activated by an electric current passing through the coils of wire.   Previous: Back Book: 1001 Section: Science and Technology Chapter: Electricity and Magnetism