a) 5.20%
b) 4.80%
c) 5.12%
d) 4.56%
Answer: a
Explanation: N1 = 1973; N2 = 1873
∆N = N2-N1
∆N = 1973-1873 = 100rpm
N = N2-N1/2
N = 1973+1873/2
= 1923
Regulation of speed = ∆N/ N
= 100/ 1923
= 0.0520
= 5.20%.
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