Power Systems
On a power system network the load is increasing represents the value of impedance

  none of above.
  decrease.
  increase.
  remains constant.

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Power Systems
Critical mass is

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

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