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Basic Electricity 101: Equation Reference

Ohms Law

OhmsLaw.png

 

I = E / R

Where E = Voltage(Volts), R = Resistance(Ω), and I = Current (Amps).

Ohm’s law can be re-written to solve for any of the parameters:

I = E / R     Solved for Current

R = E / I     Solved for Resistance

E = I * R     Solved for Voltage

 

DC Real Power

P = I * E     Used when you only have the Voltage and Current components

P = (E)2 / R     Used when you only have the Voltage and Resistance components

P = I2 * R     Used when you only have the Resistance and Current components

 

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