|
|
 |
|
|
 |
|
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
|
|
|
|
 |
|
|
