Power Systems
If a fault occurs on any feeder, the fault current is

  none of these.
  equal to unsectional bus bar.
  much lower than with unsectional bus bar.
  much higher than with unsectional bus bar.

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Power Systems
The skin effect shows that

 current density is more at the surface of the condutor
 the distribution of AC current is uniform through the cross section of the conductor
 current density is more at the centre of the condutor
 current density is lower at the surface of the condutor

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