Power Systems
Which of the following relays are used in protection of medium transmission lines?

 Mho relays
 Admittance relays
 any of the above
 Impedance relays

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Power Systems
The VSWR of transmission line is

 Directly proportional to characteristic impedance and inversely to load impedance.
 Directly proportional to voltage minimum and inversely proportional to voltage maximum.
 Proportional to load and characteristic impedance.
  Directly proportional to load impedance and inversely to characteristic impedance.

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