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
 29 MHz
 290 kHz
 29 kHz

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Power Systems
The factor affecting run off are

 the topography and nature of soil in the catchment area.
 rain fall pattern, shape and size of catchment area.
 amount of vegetation and weather condition in the catchment area.
  all of above.

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