Q
In a 3-phase, 4-pole, 50 Hz synchronous motor, the frequency, pole number and load torque all are halved. The motor speed will be____________?
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A
A. 3000 r.p.m.
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B
B. 1500 r.p.m.
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C
C. 750 r.p.m.
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D
D. None of the above
Correct Answer:
B. B. 1500 r.p.m.