An electric motor which is loaded has an effective resistance of 30 Ω and an inductive reactance of 40 Ω . If the motor is powered by a source with a maximum voltage of 420 V , the maximum current is

Question

An electric motor which is loaded has an effective resistance of 30 Ω and an inductive reactance of 40 Ω . If the motor is powered by a source with a maximum voltage of 420 V , the maximum current is, 6 A, 8 .4 A, 10 A, 12 A

MARKS App · Accepted Answer

Given, Effective resistance, R = 30 Ω Inductive reactance, X L = 40 Ω The effective impedance Z = R 2 + X L 2 = 30 2 + 40 2 = 900 + 1600 = 2500 = 50 Ω The maximum current, I = V Z = 420 50 = 8.4 A

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