Power Systems
The conductor of a 10 Km long single phase, two wire line are separated by a distance of 1.5 m the diameter of each conductor the inductance of the circuit is

 25.8 mH.
  23.8 mH.
 23.33 mH.
 21.2 mH.

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Power Systems
A thermal power station needs space

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

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Power Systems
In coal fired thermal power stations, what are the electrostatic precipitators used for?

 To remove dust particles setting on the bus bar conductors in the station switch yard
 To collect the dust particles from the flue gases
All of these
 To keep the air heaters clean

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