### The temperature gradient across a copper rod of thickness 0.02m, maintained at two temperature junctions...

Physics
JAMB 1999

The temperature gradient across a copper rod of thickness 0.02m, maintained at two temperature junctions of 20°C and 80°C respectively is
• A. 3.0 x 102Km-1
• B. 3.0 x 103Km-1
• C. 5.0 x 103Km-1
• D. 3.0 x 104Km-1
##### Explanation
Temperature Gradient = $$\frac{\Delta {\text{temp.}}}{\text{thickness}}$$

= $$\frac{80 - 20}{0.02}$$

= $$\frac{60}{0.02}$$

= 3000Km-1

= 3.0 x 103Km-1