The speed of a motor falls from 1100 r.p.m. at no-load to 1050 r.p.m. at rated load. The speed regulation of the motor is______________?
Correct answer: B. 4.76%
- A. 2.36%
- B. 4.76%
- C. 6.77%
- D. 8.84%
Explanation
Using rated-load speed as the reference, speed regulation is (1100 − 1050)/1050 × 100 = 4.76%. Using no-load speed as the denominator would give a different convention, but option b follows the standard motor definition used here.
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