MCQ
Electric door bell employs:
- APermanent Magnet
- ✓Electromagnet
- CThermistor
- DElectric bulb
✓
Answer
Correct option: B.
Electromagnet
An electric bell is a mechanical or electronic bell that functions by means of an electromagnet.
When an electric current is applied, it produces a repetitive buzzing, clanging or ringing sound.
When an electric current is applied, it produces a repetitive buzzing, clanging or ringing sound.
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