Power plants get energy from fuel, wind, or flowing water. This is used to spin magnets inside strong electric generators. Most power stations produce 25,000 or more volts of electrical force. It is lowered before reaching your home by a(n) transformer. In this device, alternating current in one coil generates current in the second coil. If you have twice asmany loops in the first coil compared to the second coil, the outgoing voltage is halved. If the second coil has twice as many loops as the first coil, the voltage is doubled.