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Ametallic conductor of irregular cross-section is as shown in the figure. Aconstant potential difference is applied across the ends $(1)$ and $(2)$. Then :
  • Athe current at the cross-section $P$ equals the current at the cross-section $Q$
  • Bthe electric field intensity at $P$ is less than that at $Q.$
  • Cthe rate of heat generated per unit time at $Q$ is greater than that at $P$
  • D
    All of the above
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