Electrical Power

Electric power is the product of current and voltage, represented in units of joules per second, or watts. For example, cars often have one or more auxiliary power outlets with which you can charge a cell phone or other electronic devices. These outlets may be rated at 20 amps and 12 volts, so that the circuit can deliver a maximum power of 240 ...

The product of the current flowing through a conductor and the voltage across it is known as electric power. The SI unit of electric power is the watt.

Consider a potential difference across a conductor. The electrical field in a conductor is directed from higher to lower potentials. Since the change in the potential difference is negativ...