The critical radius of a hollow sphere having thermal conductivity k and ho as convecting heat transfer coefficient of outer fluid is given by?
A. ho / k
B. k / ho
C. 2k / ho
D. ho / 2k
Answer:C
The critical radius of a hollow sphere having thermal conductivity k and ho as convecting heat transfer coefficient of outer fluid is given by?
A. ho / k B. k / ho C. 2k / ho D. ho / 2k