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Q#1 Induction Machines GATE EE 2008 MCQ +2 marks -0.66 marks

A 230V. 50 Hz, 4-pole, single-phase induction motor is rotating in the clockwise (forward) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8Ω, then the effective rotor resistance in the backward branch of the equivalent circuit will be

2 Ω

4 Ω

78 Ω

156 Ω

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