Electrical energy and electrical power

Core

• 4.2.5.1 Understand that electric circuits transfer energy from a source of electrical energy, such as an electrical cell or mains supply, to the circuit components and then into the surroundings
• 4.2.5.2 Recall and use the equation for electrical power P = I V
• 4.2.5.3 Recall and use the equation for electrical energy E = I Vt
• 4.2.5.4 Define the kilowatt-hour (kW h) and calculate the cost of using electrical appliances where the energy unit is the kW h