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Electric Bell

During a door...

Question

During a doorbell ringing

A

Current always flows in the circuit

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B

Electromagnet is always present

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C

Striker is always in contact with metal gong

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D

Striker always repeatedly hits metal gong

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Solution

The correct option is D Striker always repeatedly hits metal gong
Striker repeatedly hits the metal gong when doorbell is ringing.
This can be observed in regular bells used at homes.

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Q. Question 12
Elements with valency 1 are

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