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Electric Current and its Effects — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceElectric Current and its Effects1 Mark
MCQ
Which power supply can be used in electric bell:
  • A
    $AC$
  • B
    $DC$
  • C
    Can't be predicted
  • ✓
    Both $A$ and $B$
✓

Answer

Correct option: D.
Both $A$ and $B$

Electric bell works on the mechanism of electromagnets and for this, any type of power either $AC$ or $DC$ can be used.
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.

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