Question

If an electric bell cannot work in alternating current HOW IT use in household circuit

Answer 1

Answer:

A DC circuit has current circulating in one direction.

An AC circuit has the current reversing direction and changing in amplitude with the frequency of AC.. The magnetic field will follow.

In a DC setup the magnetic field is constant and follows the right hand rule . This is what you should use if you want something like a permanent magnet or in order to increase the strength of a permanent magnet.

In an AC setup it is continually changing