viola771 viola771

10-05-2017
Physics

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An electric motor has an effective resistance of 32.0 ohms and an inductive reactance of 45.0 ohms when working underload. The rms voltage across the alternating source is 420 V. Calculate the rms current

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egenriether egenriether

10-05-2017

I=V/Z. Z = 32+j45 ohm. The magnitude of this is √(32² + 45²) = 55.22 ohm
420V/55.22 ohm = 7.6A rms.

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