Power Systems
Bundled conductors are used for EHV transmission lines primarily for reducing the

 copper loss
 surge impedance of the line
 voltage drop across the line
 corona loss

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Power Systems
A thermal power station needs space

  less than that required by hydro-power station of same capacity.
 less than that required by the diesel power station of same output.
 less than that required by atomic power station of the same output.
 less than that required by a gas turbine power plant of same output.

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Power Systems
The skin effect shows that

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

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Power Systems
An impulse turbine

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

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