A-Level Physics Specification

OCR A H556

Section 4.2.5: Power

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#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