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Power Systems

Power Systems
Phase shift occurs due to which of the following components?

 inductance
 capacitance
 both 1 and 2
 conductance

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Power Systems
A hydro electric generating station is supplied from a reservoir of capacity 5 × 10 − 6 cubic meters at a head of 200 meters. Find the total energy available in KWh if the overall efficiency is 75 %

 4.06 × 106 kWh.
 5 × 106 kWh.
 3 × 106 kWh.
  2.044 × 106 kWh.

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Power Systems
In a long transmission line, if we increase the length of the line, the parameters A and B respectively

 increases and increases
 decreases and decreases
 increases and decreases
 decreases and increases

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Power Systems
If the diameter of the conductor is increased

 the inductance is decreased
 no change in inductance and resistance
 the inductance is increased
 the resistance is increased

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Power Systems
If sag in an overhead line increase, tension in the line

 decrease
 remains same
None of these
 increase

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Power Systems
a 50 Hz, 3-phase synchronous generator has inductance per phase of 15 mH. The capacitance of the generator and circuit breaker is 0.002 µF. What is its natural frequency?

 2.9 kHz
 290 kHz
 29 MHz
 29 kHz

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