Two identical long, solid cylinders are used to conduct heat from temp `T_(1)` to Temp `T_(2)`. Originally the cylinders are connected in series and the rate of heat transfer is H. If the cylinders are connected in parallel then the rate of heat transfer would be:

Options

A. `H//4`
B. `2H`
C. `4H`
D. `8H`

Answer

C

Explanation

Initially effective resistance = `2R` . In parallel effective resistance =`R/2` . It has reduced by a factor of `1//4` so rate of heat transfer would be increased by a factor of 4, keeping other parameters same.