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1. |
A synchronous motor is running from busbars and has a torque angle of = 15 . The bus voltage and frequency are reduced by 10% while field current and load torque are held constant (all losses are negligible).The new torque angle will |
A. | remain the same |
B. | increase slightly |
C. | decrease slightly |
D. | the motor will lose synchronism |
Answer» C. decrease slightly | |