Power Systems
A 1-phase transmission line has an impedance (3+4j) Ω . Find the power factor of the load for achieving maximum and zero voltage regulation?

 0.8 lag and 0.8 lead
 0.6 lag and 0.8 lead
 0.8 lag and 0.6 lead
 0.6 lag and 0.6 lead

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Power Systems
The value of off diagonal elements is

 which is connected between bus i and bus j with negative sign
 sum of admittances connected at bus j
 which is connected between bus i and bus j with positive sign
 sum of admittances connected at bus i

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