Power Systems
Maximum power transfer capability of transmission line can be increased by

 Parallel transmission lines
 Using bundled conductors
All of these
 Using series capacitance

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Power Systems
The value of off diagonal elements is

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

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