Explanation: The space angle α means that MMF wave at any moment is sinusoidally distributed in space along the air-gap periphery. 5. Three phase voltages are applied to the three windings of an electrical machine. If any two supply terminals are interchanged, then the rotating MMF wave _____________
A. Direction reverses, amplitude alters
B. Direction reverses, amplitude unaltered
C. Direction remains same, amplitude alters
D. Direction remains same, amplitude unaltered
Answer:A
Explanation: The space angle α means that MMF wave at any moment is sinusoidally distributed in space along the air-gap periphery. 5. Three phase voltages are applied to the three windings of an electrical machine. If any two supply terminals are interchanged, then the rotating MMF wave _____________
A. Direction reverses, amplitude alters B. Direction reverses, amplitude unaltered C. Direction remains same, amplitude alters D. Direction remains same, amplitude unaltered