A 3 phase synchronous motor is running clockwise. In case the direction of its field current is reversed then

Question

Examoogle · Accepted Answer

Option C: Motor will continue to run in the same direction

Explanation & Concepts:
{"type":"reasoning","methodBadge":"Electrical Concept Understanding","trick":"Recognize that reversing the field current does not change the rotor's motion if it's already synchronized.","diagramSvg":"
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 Motor: CWField Current ReversedStill CW","steps":[{"title":"Identify the current motor direction","explanation":"The motor is currently running clockwise (CW). In synchronous motors, once the rotor is synchronized with the magnetic field, it continues to run in the same direction unless the mechanical conditions change."},{"title":"Understand the effect of reversing the field","explanation":"Reversing the field current alters the magnetic field's orientation. However, since the rotor is synchronized, it will adjust to this change but will maintain its current rotational direction."},{"title":"Conclusion","explanation":"Since the motor was running CW and the rotor adapts to the reversed field without changing mechanical conditions, the motor continues to run in the same direction."}],"eliminationNote":{"A":"Winding of the motor will not burn as synchronous motors are designed to handle field changes without overheating.","B":"The motor cannot run in reverse because it remains synchronized with the CW direction.","D":"The motor will not stop as the mechanical synchronization keeps it running."},"answer":"C is correct because the motor adapts to the reversed field current while maintaining its current clockwise motion due to synchronous operation.","correctedOptions":["Winding of the motor will burn","Motor will run in the reverse direction","Motor will continue to run in the same direction","Motor will stop"],"coreConcepts":["Synchronous Operation","Field Reversal Effects","Motor Direction Stability"],"crossTopicTip":"Familiarize with synchronous motor behavior in exams, as questions often test similar concepts about field changes and motor function."}

Examoogle · Answer

Option A: Winding of the motor will burn

Examoogle · Answer

Option B: Motor will run in the reverse direction

Examoogle · Answer

Option D: Motor will stop

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