Power Systems
The main advantage of the Decoupled Load Flow (DLF) as compared to the NR method is

All of these
 accuracy is more
 number of iterations are less
 reduced memory requirements in storing the Jacobian elements

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Power Systems
Critical mass is

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

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