ocr: ELECTRIC BELL NE OF THE EVERYDAY uses of HAMMER Jelectromagnetism is the electric door bell. When you press the button at the door, you connect two electrical contacts. This allows current to flow BELL around a circuit. An electromagnet and aspring pull the hammer to and fro sO that it repeatedly strikes a metal bell. ARMATURE CONTACTS How It Works Pusze > ELECTRO- SPRING MAGNET BUTTON. BATTERY Wuo -
(.png)
