Two ends of a conducting rod of varying cross-section are maintained at `200^(@)C` and `0^(@)C` respectively. In steady state: A. temperature differences across `AB and CD` are equalB. temperature difference aross `AB` is greater than that across `CD`C. temperature difference aross `AB` is less than that across `CD`D. temperature difference may be equal or different depending upon thermal conductivity of the rod.

Two ends of a conducting rod of varying cross-section are maintained a

1.	Two ends of a conducting rod of varying cross-section are maintained at `200^(@)C` and `0^(@)C` respectively. In steady state: A. temperature differences across `AB and CD` are equalB. temperature difference aross `AB` is greater than that across `CD`C. temperature difference aross `AB` is less than that across `CD`D. temperature difference may be equal or different depending upon thermal conductivity of the rod.
Answer» Correct Answer - C Rate of flow of heat `(dQ)/(dt)` of `H` is equal throughout the rod, temperature difference is given by `T.D = (H)` (thermal Resistance) or `T.D prop` theramal Resistance `R` Where `R = (l)/(KA) or R prop l/A` Area across `CD` is less. therefore `T.D` across `CD` will be more`.

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