how dose a school bell works

Answers
Answer:
When the switch (K) is closed, an electric current passes from the battery (U) through the winding of the electromagnet. It creates a magnetic field that attracts the iron arm of the clapper, pulling it over to give the bell a tap.
Explanation:
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An electric bell has an electromagnet that pulls a strip of iron which makes the hammer hit the gong to ring the bell.
How does an electric bell work using electromagnets 1Step 1: When you push the switch of the bell, an electric current flows to the electromagnet
Step 2: The electromagnet attracts the soft iron strip. The hammer attached to the strip then hits the gong, making it ring .
Step 3: When the soft iron strip gets attracted to the electromagnet, it no longer touches the screw (interrupter) and hence the circuit is broken (much like a switch being turned off). This turns off the electromagnet
and it can no longer attract the soft iron strip. The soft iron strip returns to its initial position, touching the screw (interrupter). This results in the circuit being complete, and current flows again .
Steps 1 to 3 repeat in quick succession as long as the switch is on. This is how we hear a continuous ring of the bell.