A synchronous motor on load draw a current at a leading power factor a – McqOptions

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1.	A synchronous motor on load draw a current at a leading power factor angle ϕ. If the internal power factor angle which is the phase angle between the excitation emf and the current in the time phasor diagram is ψ. Then the air gap excitation mmf lags the armature mmf by
A.	Ψ
B.	π/2 + ψ
C.	π/2 – ψ
D.	Ψ+ ϕ
Answer» D. Ψ+ ϕ

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