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mathematical formula for ohms law. Ohms law formula The resistors current I in amps A is equal to the resistors voltage V in volts V divided by the resistance R in ohms O. Displaystyle boldsymbol V boldsymbol Icdot boldsymbol Z where V and I are the complex scalars in the voltage and current respectively and Z is the complex impedance.
The Ohms Law wheels and graphics below can be a very useful tool to jog your memory and help you to understand their relationship. R Volts divided by the current 2 volts divided by 2 amperes 1 ohm. Ohms Law states that it takes 1 volt to push 1 amp through 1 ohm of resistance.
In this way the current is found by dividing the voltage by the resistance.
I Current in amps. Sometimes its very helpful to associate these formulas Visually. In some cases Ohms law uses the letter E to represent voltage. Calculate the amount of electric current in a circuit using Ohms law.