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Question
How does the magnetic effect of electric current help in the working of an electric bell? Explain with the help of a diagram.
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Solution
When the switch is pushed closed, the circuit is completed and current flows through the electromagnetic coil.
1. The iron striker is attracted to the electromagnet and strikes the bell.
How an Electric Bell Works
2. As the striker moves towards the bell, the contact is broken. Electricity stops flowing through the coil which loses its magnetism.
3. The spring returns the striker to its original position which makes a new contact and so electricity flows again.
Back to number 1 and the cycle repeats itself. The bell will continue to ring as long as the switch is held closed.
1. The iron striker is attracted to the electromagnet and strikes the bell.
How an Electric Bell Works
2. As the striker moves towards the bell, the contact is broken. Electricity stops flowing through the coil which loses its magnetism.
3. The spring returns the striker to its original position which makes a new contact and so electricity flows again.
Back to number 1 and the cycle repeats itself. The bell will continue to ring as long as the switch is held closed.
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