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Find potential at point $C$ and $D$
  • A$V_C = 6\,V$ ; $V_D = 9\,V$
  • B$V_C = 9\,V$ ; $V_D = 6\,V$
  • C$V_C = -9\,V$ ; $V_D = -6\,V$
  • D$V_C = -6\,V$ ; $V_D = -9\,V$
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