E with I and R
Voltage Equals Current Times Resistance
If you know the current and resistance of a circuit, then by multiplying
these two numbers together you will have calculated the voltage. This is not a
common calculation for an electrician since the resistance of a load is rarely
known. Some people think this is Ohms Law but R equals E divided by I has the
honor of being designated as Ohms Law.
Example, if the current of a load is .83 amps and the resistance is 144
ohms, then the voltage equals .83 times 144 or 120 volts.
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