An electric current flows along an insulated strip $PQ$ of a metallic conductor. The current density in the strip varies as shown in graph of figure. Which one of the following statements could explain this variation ?
 
  • AThe strip is narrower at $P$ than at $Q$
  • BThe strip is narrower at $Q$ than at $P$
  • C
    The potential gradient along the strip is uniform
  • D
    The resistance per unit length of the strip is uniform
Medium
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