# Electricity Equations

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- Created by: Sophie
- Created on: 06-04-14 18:01

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- Electricity Equations
- power = voltage x current
- P = VI

- voltage = current x resistance
- V = IR

- charge = current x time
- Q = It

- energy = voltage x charge
- E = VQ

- energy = current x voltage x time
- E = IVt

- total cost = number of units x cost per unit
- voltage across primary coil/voltage across secondary coil = number of turns on primary coil/number of turns on secondary coil

- power = voltage x current

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