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Torque angle for the synchronous machine is the angle between

(A) stator magnetic field and rotor magnetic field

(B) stator magnetic field and net magnetic field in the air gap

(C) rotor magnetic field and net magnetic field in the air gap

(D) excitation voltage and impedance voltage drop

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Torque angle for the synchronous machine is the angle between rotor magnetic field and net magnetic field in the air gap

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