Power Systems
A 1-phase transmission line has an impedance (3+4j) Ω . Find the power factor of the load for achieving maximum and zero voltage regulation?

 0.6 lag and 0.6 lead
 0.8 lag and 0.8 lead
 0.8 lag and 0.6 lead
 0.6 lag and 0.8 lead

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Power Systems
Critical mass is

 maximum mass of fissionable material required to sustain a chain reaction.
 a mass of fissionable material required to stop a chain reaction.
 none of these.
  minimum mass of fissionable material required to sustain chain reaction.

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