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

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

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Power Systems
Half life is defined as

 none of above.
 the time required to spiliting of a heavy nucleus.
 the time required for full of atoms in a specimen disintegrate.
  the time required for one half of isotope to decay.

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Power Systems
Consider a three phase, 50 Hz, 11 kV distribution system. Each of the conductors is suspended by an insulator string having two identical porcelain insulators. The self capacitance of the insulators is 5 times the shunt capacitance between the link and ground. Find the voltage across the two insulators V1 and V2? (V1 = Voltage of disc nearest to the conductor)

 V1 = 2.89 kV and V2 = 3.46 kV
 V1 = 5 kV and V2 = 6 kV
 V1 = 3.46 kV and V2 = 2.89 kV
 V1 = 6 kV and V2 = 5 kV

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