Question

How does an electromagnet make an electric bell work?

Answer 1

The switch is open and the metal arm is away from the gong.

When the switch is closed, an electric current flows through the electromagnet, producing a magnetic field. The metal arm is attracted to the electromagnet. It hits the gong which makes a sound.

When the circuit is broken, the electromagnet turns off and the metal arm springs back.

The contacts touch and the circuit is complete again.

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Answer 2

when we press the push button, electric current passes through the coil of the electromagnet and it get magnetized. it then attracts the soft iron bar (armature) towards itself. The hammer attached to the iron bar strikes the gong and produces a sound.