The rated load of an underground cable is always _______its natural load.

The insulation level of a $$400$$ kV, EHV overhead transmission line is decided on the basis of

The surge impedance of a $$400$$ km long overhead transmission line is $$400$$ $$\Omega $$. For a $$200$$ km length of the same line, the surge impedance will be

In load-flow analysis, a voltage-controlled bus is treated as a load bus in subsequent iteration for a _________limit is violated.