But at the University of Oxford, they have an electric bell that has been ringing essentially non-stop on one set of batteries for about 178 years! Is the energy crisis solved then? Perhaps not.

In the Valley, we go back to the AT&T, Bell Labs, Western Electric,” said Doug Dopp, a senior manufacturing director at ...

They are found in electric motors and loudspeakers. Electric bells like the ones used in most schools also contain an electromagnet. The slideshow describes how an electric bell works.