Power Systems
Maximum power capacity of a transmission line can be increased by

 either 1 or 2
 nether 1 nor 2
 decreasing reactance value
 increasing voltage level

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Power Systems
The factor affecting run off are

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

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