Power Systems
The receiving end voltage for a long line under no load condition is

 any of the above
 more than the sending end voltage
 equal to the sending end voltage
 less than the sending end voltage

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Power Systems
The advantage of hydro electric power station over thermal power station is

 the operation cost of hydro electric power station is low
 hydro electric power station can supply the power throughout the year
 the initial cost of hydro electric power station is low
 hydro electric station can be constructed at the place where the energy is required

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