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For improvement of commutation in ac series motors shunted commutating poles are commonly used and commutating pole windings are shunted by a | |
A. | non-inductive resistor to make the commutating pole current to lead the main current. [Wrong Answer] |
B. | non-inductive resistor to make the commutating pole current to lag behind the main current. [Correct Answer] |
C. | reactor to make the commutating pole current to lag behind the main current. [Wrong Answer] |
D. | given statements are false. [Wrong Answer] |