The cost of an induction motor will increase as________________?
Correct answer: A. horsepower rating increases but r.p.m. decreases
- A. horsepower rating increases but r.p.m. decreases
- B. horsepower rating decreases but r.p.m. increases
- C. horsepower rating and operating speed increases
- D. horsepower rating and operating speed decreases
Explanation
An induction motor becomes more expensive when its horsepower increases and its speed decreases, because the lower-speed motor requires a larger electromagnetic structure for the same power. Higher speed generally permits a smaller and cheaper motor.
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