GCSE PHYSICS - Which Equations are used for Electricity?

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The Equations that are used for Electricity.

Click on an equation below for more information.

The two most important equations in electricity are given below.

P = V x I power = voltage x current.

V = I x R voltage = current x resistance.

Other equations that you should know include

P = E ÷ t power = energy ÷ time.

Q = I x t charge = current x time.

E = V x I x t energy = voltage x current x time.

E = V x Q energy = voltage x charge.

W = V x Q work = voltage x charge.

The equations work whether the electricity is
direct current or alternating current. See calculations.

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