Electric Bell

An electric bell is a common device used for doorbells, and it operates using an electromagnet.

Electric bell

Components:

• Electromagnet: A coil of copper wire wound around an iron piece.
• Iron Strip and Striker: An iron strip is attached to a striker, which hits the gong to produce sound.
• Contact Screw: This screw touches the iron strip and helps complete the electric circuit.

1. When the bell button is pressed, the electric circuit is closed, and current flows through the coil, turning it into an electromagnet.
2. The electromagnet attracts the iron strip, pulling it towards the coil. As a result, the striker attached to the iron strip hits the gong, creating a sound.
3. As the iron strip moves, it loses contact with the contact screw, breaking the circuit and stopping the current.
4. With no current, the electromagnet loses its magnetism, and the iron strip returns to its original position, coming back in contact with the contact screw.
5. This action completes the circuit again, allowing the current to flow. The process repeats, making the bell ring continuously as long as the button is pressed.