Power Systems
The draw back of NR method as compare to Gauss-Seidel method is/are?

None of these
 large number of iterations
 both 1 and 2
 large requirement of computer memory

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Power Systems
Critical mass is

  minimum mass of fissionable material required to sustain chain reaction.
 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.

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