Power Systems
For a lossy transmission line, the characteristic impedance does not depend on

 The load terminating the line.
 The permittivity of the dielectric separating the conductor.
 The conductivity of conductors.
 The operating frequency of the line.

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Power Systems
Gas coolled reactor

 use coolant at pressure of 14-28 Kg/cm2 and at temperature of 700°-800° c.
 use CO2. or helium as coolant and graphite the moderator.
  both B and C.
 use heavy water as coolant as well as moderator.

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Power Systems
The value of off diagonal elements is

 which is connected between bus i and bus j with negative sign
 sum of admittances connected at bus i
 which is connected between bus i and bus j with positive sign
 sum of admittances connected at bus j

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