Power Systems
An impulse turbine

  operates by initial complete conversion to kinetic energy.
 always operates submerged.
 is most suited for low head and high discharge power plants.
 makes use of a draft tube.

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Power Systems
The skin effect shows that

 current density is more at the surface of the condutor
 current density is lower 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

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