I With P and R
Note: For this calculation be sure to make the calculation under the
radical sign before finding the square root.
The current equals the square root of the quantity of wattage divided by
resistance.
So if you know the wattage and resistance, then the square roof of the
quantity wattage divided by resistance equals the current.
Example: If the wattage is 100 watts and the resistance is 144 ohms, then
the square root of 100 divided by 144 is .833.
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