The correct answer is: C. Both (A) and (B)
Sparking in a DC motor is the arcing that occurs between the commutator and the brushes. It is caused by the difference in potential between the two, which is created by the rotation of the armature. Sparking can damage the commutator and the brushes, and it can also cause the motor to overheat.
To reduce sparking, the commutator and the brushes should be kept clean and free of dirt and debris. The brushes should also be properly aligned with the commutator. If sparking is excessive, the motor may need to be serviced.
Here is a brief explanation of each option:
- A. It increases the input power consumption
Sparking causes the motor to draw more current than it would otherwise. This increases the input power consumption, which can lead to higher energy costs and increased wear and tear on the motor.
- B. Commutator gets damaged
The sparking also causes the commutator to wear down more quickly. This can lead to problems with the motor’s performance, and it may eventually require the commutator to be replaced.
- C. Both (A) and (B)
Both of these problems can occur as a result of sparking. In some cases, one problem may be more severe than the other. However, both problems can lead to increased costs and decreased performance, so it is important to take steps to reduce sparking.