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A distribution feeder of $1\:km$ length having resistance, but negligible reactance, is fed from both the ends by $400V$, $50\:Hz$ balanced sources. Both voltage sources $S_1$ and $S_2$ are in phase. The feeder supplies concentrated loads of unity power factor as shown in the figure.

The contributions of $S_1$ and $S_2$ in $100\:A$ current supplied at location $P$ respectively, are

  1. $75\:A$ and $25\:A$
  2. $50\:A$ and $50\:A$
  3. $25\:A$ and $75\:A$
  4. $0\:A$ and $100\:A$
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