When a balanced 3-phase distributed type armature winding is carrying 3-phase, balanced currents, the strength of the resultant rotating magnetic field is
A. three times the amplitude of each constituent pulsating magnetic field.
B. equal to the amplitude of each constituent pulsating magnetic field.
C. half the amplitude of each constituent pulsating magnetic field.
D. one and half times the amplitude of each constituent of pulsating magnetic field. [U.P.S.C. I.E.S. 1994]
Answer:D
When a balanced 3-phase distributed type armature winding is carrying 3-phase, balanced currents, the strength of the resultant rotating magnetic field is
A. three times the amplitude of each constituent pulsating magnetic field. B. equal to the amplitude of each constituent pulsating magnetic field. C. half the amplitude of each constituent pulsating magnetic field. D. one and half times the amplitude of each constituent of pulsating magnetic field. [U.P.S.C. I.E.S. 1994]