Your gadgets run on direct current, but the electricity in your home is alternating current. What’s up with that?

image: You turn on a switch and the light switches on because electricity 'flows'. The usual perception is that this is like opening a faucet and the water starts to flow.

The use of either DC or AC current will depend on the need or application. Electric vehicles, batteries, and electrical equipment that need a steady, unidirectional flow of electricity are among ...