Q.

In a 3-phase synchronous motor 

  • AThe filed mmf leads the air gap flux leads the armature mmf
  • BThe armature mmf leads the air gpap flux and air gap flux leads the field mmf
  • CThe armature mmf leads the air gap flux and air gap flux lags behind the field mmf
  • DNone of the above 
Correct Answer : (B)

The armature mmf leads the air gpap flux and air gap flux leads the field mmf

Hints :

In a 3-phase synchronous motor the armature mmf leads the air gpap flux and air gap flux leads the field mmf.

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