Physics

Problem

A copper rod of cross-sectional area

2.0\,\text{cm}^2

and length

40\,\text{cm}

conducts heat at a steady rate of

50\,\text{W}

. Calculate the temperature difference between its ends. (Thermal conductivity of copper

k = 400\,\text{W m}^{-1}\text{K}^{-1}

.) a)

25\,\text{K}

500\,\text{K}

250\,\text{K}

125\,\text{K}