Q.Synchronizing torque will come into operating whenever

  • AThere is a difference in the magnitude of voltages
  • BThere is a phase difference in the voltages
  • CThere is a frequency difference between the two voltages and Excitation of one of the alternator is changed
  • DIn all of the above cases
Correct Answer : (D)

In all of the above cases

Hints :

Synchronizing torque will come into operating in these conditions 1. There is a difference in the magnitude of voltages, 2. There is a phase difference in the voltages, 3. There is a frequency difference between the two voltages and Excitation of one of the alternator is changed.

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