BASIC ELECTRICAL FORMULAS

Current
                                                                              Basically electrons spin around the nucleus in a circular path. this is basically because the protons in the  atoms nucleus carry a positive charge that attack the electrons but the size of the electrons is too small to fit inside the nucleus hence it maintain some gap. if enough valance electrons decide to move on preferably in a more or less uniform steam we end up with usable electricity the rate of flow of charges or electrons is current . 

voltage 

voltage is defined as the Electricpotential difference between the two end of the conductor in other words the voltage is defined as the force or pressure needed to drive or make a electron flow which is current .voltage is also called as electromotive force which is the quantitative expression of the potential difference in charge between two points in an field

FORMULA

BASIC ELECTRICAL FORMULAS

Volts (E):
Volts  =  square root of (watts x ohms)
 Volts  =  watts  /  amperes
  Volts  =  amperes x ohms

Watts (W):
  Watts  =  volts²  /  ohms  Watts  =  volts x amperes

Amperes (I):
  Amps  =  volts  /  ohms  Amps  =  watts  /  volts

Ohms (R):  
 Ohms  =  volts  /  amperes  Ohms  =  volts²  /  watts         

AC Motor Formulas

 E = voltage / I = amps / W = watts / PF = power factor / Eff = efficiency / HP = horsepower

Three Phase:

Current (amps) I        = HP x 746        1.73 x E x Eff x PF
Current (amps) I       = KW x 1000        1.73 x E x PF
Current (amps) I       = Kva x 1000      1.73 x E         

Single Phase:

Current (amps)        I       =      HP x 746          E x Eff x PF
Current (amps)        I       =      KW x 1000       E x PF
Current (amps)        I       =      Kva x 1000