Electric Circuits
Three identical resistor are connected in star across a 3 phase 550 V supply dissipating a total power of 300 W the line current is ____________ A.

 1
 2.56
 0.5
 3.149

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Electric Circuits
A pole of driving point impedance is

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

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