Physics Equations

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