Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to_____________?
Correct answer: B. eliminate creeping at no load
- A. improve its ventilation
- B. eliminate creeping at no load
- C. increase its deflecting torque
- D. increase its braking torque
Explanation
Opposite holes reduce the effect of frictional or unequal magnetic forces that can rotate the disc when no load is connected. This prevents creeping, the slow unwanted rotation of an energy-meter disc at no load.
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