AS Physics Unit 2 Topic 5 DC Electricity - Formulae (Edexcel spec)

Q = I x t

Q=Charge(C) I= Current(A) t =Time(s)

W = Q x V

W=Energy transfered/work done (J) Q=Charge(C) V=Potential Difference(V)

Efficiency = (Useful energy out / Total energy in) x 100

 I= n x A x V x q
                                                                 …