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Click the pale yellow  [Ω] button on the Engineering Keypad to launch the Ohms Law Calculator. For a detailed description of the Multiple-Entry Calculators, click this link.

Given any two: Power (P), Current (I), Voltage (V), or Resistance (R), find the two unknowns.

Here we solved for P and E using the default units, with a current of 37.5A and a resistance of 1.25Ω.