Physics Equations

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Equations about electricity:

V = Voltage I = Current R = Resistance P = Power Q = Charge E = Energy t = time Vp=Voltage in primary coil

Vs =voltage in the secondary coil Np=number of turns of wire on the primary coil Ns = number of turns of wire on the secondary coil

V = IR

Voltage = Current x Resistance

P = VI

Power = Voltage x Current

Q = It

Charge = Current x time

E = VQ

Energy = Voltage x Charge

E = VIt

Energy = Voltage x Current x time

Vp/Vs = Np/Ns

Voltage in primary coil/voltage in the secondary coil.

number of turns of wire on the primary coil/number of turns of wire on the secondary coil.

Total cost = number of units x cost per unit.

Used for working out electricity bills