Variation of current passing through a conductor as the voltage applied across its ends as varied is shown in the adjoining diagram. If the resistance $(R)$ is determined at the points $A$, $B$, $C$ and $D$, we will find that
  • A$R_C = R_D$
  • B$R_B > R_A$
  • C$R_C > R_B$
  • D
    None of these
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