Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diam

Question

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2 .k), when the insulation thickness is ________________ mm?

Options:

A . 15

B . 25

C . 10

D . 30

Answer: Option B
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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