The two ends of a metal rod are maintained at temperatures 100^(@)C and 110^(@)C. The rate of heat flow in the rod is found to be 4.0" Js"^(-1). If the ends are maintained at temperatures 200^(@)C and 210^(@)C, the rate of heat flow will be :

The two ends of a metal rod are maintained at temperatures 100^(@)C an

1.	The two ends of a metal rod are maintained at temperatures 100^(@)C and 110^(@)C. The rate of heat flow in the rod is found to be 4.0" Js"^(-1). If the ends are maintained at temperatures 200^(@)C and 210^(@)C, the rate of heat flow will be :
Answer» `16.8" Js"^(-1)` `8.0" Js"^(-1)` `4.0" Js"^(-1)` `44.0" Js"^(-1)` SOLUTION :From `H=kA((T_(1)-T_(2))/(L))`, (i) `H_(1)kA((110-100)/(L))` `H_(1)=10(kA)/(L)` (ii) `H_(2)=kA((210-20)/(L))=10(kA)/(L)` `:.H_(1)=H_(2)` `:." Js"^(-1)=H_(2)`