A-Level Physics OCR A H556

4.2.5: Power

#4.2.5a

the equations $P = VI$ , $P = I^2R$ and $P = \dfrac{V^2}{R}$

#4.2.5b

energy transfer; $W = VIt$

#4.2.5c

the kilowatt-hour (kW h) as a unit of energy; calculating the cost of energy.

Learners will be expected to link this with 3.3.3c

4.2.4

Resistivity

4.3.1

Series and parallel circuits