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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
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Correct Answer: Option B
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

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