Power and energy transfers



The electrical energy which is provided by the cell, battery or power supply in a circuit is transferred to the components within the circuit.  In this video, we’ll look in detail at how this works, focusing in particular on how the power transfer in circuits can be determined by using suitable circuit diagrams.  We will also look at the kilowatt-hour (kWh), a unit of electrical energy transfer which many students find slightly difficult to understand at first.

Key Words

kilowatt-hour, kWh, kilowatt, resistance, hour, power, watt, current, potential difference, joule