Part of the reason why electricity seems so mystifying is because you can’t see it. But things such as voltage, current, power, and wattage can be explained by imagining electricity in cables as if it was water flowing in a pipe. Voltage is the “pressure of electricity”, and current is the flow-rate.
Voltage is potential, like a head of a stream, a static pressure of electricity waiting to flow.
Current is measured in amps. If electrons are the atoms of electricity, you’d see six million million million of them flow per second for each amp of current there is. (electrons are very small – many household appliances have several amps as a working current).
Power is easy to work out, as it’s voltage multiplied by current.
But on electricity bills you don’t pay for power, you pay for energy. Energy is power * time. A one kilowatt (1000w) heater running for one hour has used one kilowatt-hour.
