Power Systems
A sort line with R/X ratio 1, the zero regulation is obtained when the power factor of the load is

 0.5
 0 leading
 unity
 0.707 leading

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Power Systems
Which of the following statement is/are true?Zn

 The neutral grounding impedance Zn appears as 3Zn in zero sequence equivalent circuit
 nether 1 nor 2
 both 1 and 2
 The neutral grounding impedance Zn appears as Zn in zero sequence equivalent circuit

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