A) To ensure good contact between the stationary components and the moving components
B) To allow the coil to rotate continuously
C) To ensure the unidirectional flow & current.
D) To prevent the wires from getting entangled.
Correct Answer: B
Solution :
The split-ring commutator in a D.C. motor causes the alternating current in the coil to change its direction every \[\text{18}0{}^\circ \] turn, converting it into direct current. This change will enable the coil to rotate continuously.
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