Question 229Electricity & Electronics - Assistant Engineer

The correct answer is D) The synchronous motor initially starts as an induction motor and when it approaches synchronous speed, the motor then runs as a synchronous motor. This is because a synchronous motor requires an external source to start it and bring it up to near-synchronous speed. Once it reaches near-synchronous speed, the motor can then be switched to run as a synchronous motor, which maintains a constant speed based on the frequency of the power supply. The other options are incorrect because they do not accurately describe the starting and operating characteristics of a synchronous motor. Option A is incorrect as the motor does not start as a synchronous motor. Option B is incorrect as the motor does not run as an induction motor once it approaches synchronous speed. Option C is incorrect as the motor does not start as an induction motor.