A 60 W lamp buried in soil (𝑘 =0.83 W/mK) at 0°𝐶 is switched on. The soil temperature at 0.3 m away from the lamp at steady state is:
A. 18°𝐶
B. 19°𝐶
C. 20°𝐶
D. 21°𝐶
Answer:B
A 60 W lamp buried in soil (𝑘 =0.83 W/mK) at 0°𝐶 is switched on. The soil temperature at 0.3 m away from the lamp at steady state is:
A. 18°𝐶 B. 19°𝐶 C. 20°𝐶 D. 21°𝐶