Electric Circuits
Number of branches of a graph should be --------- number of branches of a network

 equals to
 greater than
 less than equals to
 less than

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Electric Circuits
A pole of driving point impedance is

 zero voltage for a finite value of driving current.
 zero current for a finite value of driving voltage.
 zero current for a finite value of driving current.
 zero voltage for a finite value of driving voltage.

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