Power Systems
Which of the following statements are true?

 Bus admittance matrix is a sparse matrix
 nether 1 nor 2
 Bus impedance matrix is a full matrix
 both 1 and 2

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Power Systems
Which of the following is/are the advantages of synchronous phase modifier over the shunt compensation?

 initial cost is low
 smooth voltage regulation is possible by controlling excitation
 single unit can be used as both capacitance and inductor by adjusting the excitation
 both 1 and 2

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