Range of ‘d’ for stable operation - Swing Equation and Curve

Q.  What is the range of ‘δ’ for stable operation?
- Published on 14 Oct 15

a. 0° < δ < 45°
b. 45° < δ < 90°
c. 0° < δ < 90°
d. 0° < δ < 120°

ANSWER: 0° < δ < 90°

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