The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is______________?
Correct answer: D. 0.5
- A. 4.0
- B. 2.0
- C. 1.0
- D. 0.5
Explanation
Mechanical power is proportional to E_b(V - E_b), which is maximum when E_b = V/2. Therefore, the ratio E_b/V is 0.5.
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