The two ends of a metal rod are maintained at temperatures $100 ^o C$ and $110^o C$. The rate of heat flow in the rod is found to be $4.0\ J/s$. If the ends are maintained at temperatures $200^o\  C$ and $210^o\ C$, the rate of heat flow will be.... $J/s$

  • [AIPMT 2015]
  • A

    $44$

  • B

    $16.8$

  • C

    $8$

  • D

    $4$

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