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Electric Current and its Effects — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceElectric Current and its Effects1 Mark
MCQ
During a doorbell ringing:
  • A
    Current always flows in the circuit.
  • ✓
    Electromagnet is always present.
  • C
    Striker is always in contact with metal gong.
  • D
    Striker always repeatedly hits metal gong.
✓

Answer

Correct option: B.
Electromagnet is always present.
Striker repeatedly hits the metal gong when doorbell is ringing.
This can be observed in regular bells used at homes.

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