Power Systems
In a 220 kV system, the inductance and capacitance up to the circuit breaker location are 25 mH and 0.025 µF respectively. The value of resistor required to be connected across the breaker contacts which will give no transient oscillations, is

 500 Ω
 25 Ω
 250 Ω
 1000 Ω

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Power Systems
In hydroelectric power plants

 both operating and initial cost are low.
 both operating and initial cost are high.
 operating cost is high and initial cost is low.
  operating cost is low and initial cost is high.

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

 both 1 and 2
 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

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