For a current-carrying wire of 20 mm diameter exposed to air (h = 20 W/m2K), maximum heat distribution occurs when the thickness of insulation (k = 0.5 W/mK) is

For a current-carrying wire of 20 mm diameter exposed to air (h = 20

1.	For a current-carrying wire of 20 mm diameter exposed to air (h = 20 W/m2K), maximum heat distribution occurs when the thickness of insulation (k = 0.5 W/mK) is
A.	20 mm
B.	10 mm
C.	2.5 mm
D.	None of the above
Answer» E.

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For a current-carrying wire of 20 mm diameter exposed to air (h = 20 W/m2K), maximum heat distribution occurs when the thickness of insulation (k = 0.5 W/mK) is

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