What is the function of an electromagnet in an electric doorbell? 1) it acts as a switch to open the circuit 2) it acts as a switch to close the circuit. 3) it repels a metal striker, which then pulls away from the bell 4) it attracts a metal striker, which then hits the bell.

4) it attracts a metal striker, which then hits the bell.

Explanation:

An electric doorbell uses an electromagnet. When the switch is pressed, the circuit gets complete which generates electric current in the wire. The wire is coiled around a metal. When current flows through the coiled wire, magnetic field is generated. This magnetic field attracts the striker which then hits the bell and sound is produced.

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