• question_answer 6.0 kJ of conduction heat transfer has to take place in 10 minutes from one end to other end of a metallic cylinder of 10 cm cross-sectional area, length 1 metre and thermal conductivity as 100 W/m.K. What is the temperature difference between the two ends of the cylindrical bar? A) $80{}^\circ C$            B) $100{}^\circ C$C) $120{}^\circ C$                      D) $160{}^\circ C$

Correct Answer: B

Solution :

$Q=kA\,\frac{\left( {{t}_{1}}-{{t}_{2}} \right)}{L}$ ${{t}_{1}}-{{t}_{2}}=\frac{QL}{kA}=\frac{6\times {{10}^{3}}}{100\times 60\times 100\times 10\times {{10}^{-\,4}}}$             $=\,100{}^\circ C$

You need to login to perform this action.
You will be redirected in 3 sec