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ENGINEERING FORMULA

 

ELECTRICAL

    DIRECT CURRENT(DC)
    I = current(amps.), V = voltage(volts), R = resistance(ohms), P = power(watts)

    • CURRENT:
    I = V/R or I = P/V    

    • VOLTAGE:
    V= P/I or V = IR  

    • POWER:
    I2R or VI       

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    • RESISTANCE:
    R = V/I   

    ALTERNATING CURRENT(AC):

    Il = line current(amps.), Ip = phase current(amps.), Vp = phase voltage(volts), Vl = line voltage(volts), Z = impedance(ohms), P = power(watts), f = power factor(angle), VA = volt ampers

    • CURRENT(single phase):
    I = P/(Vp cos(f)

 

 

                                                                                
                                                                                       Last updated 08-25-2015