MCQ
Name one device that uses an electromagnet.
- ✓Electric bell
- BBarometer
- CLactometer
- DAll the above
✓
Answer
Correct option: A.
Electric bell
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.
The magnetic field disappears when the current is turned off.
Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field.
The wire turns are often wound around a magnetic core made of generally iron.
Electromagnets are widely used as components of electrical devices such as Electric Bell ,motors, generators, loudspeakers, hard disks, $\text{MRI}$ machines, scientific instruments, etc.
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