Discussion Forum
Que. | An electric cable of aluminum (k = 240 W/ m degree) is to be insulated with rubber (k = 6 W/ square meter degree). If the cable is in air (h = 6 W/square meter degree). Find the critical radius? |
a. | 80 mm |
b. | 160 mm |
c. | 40 mm |
d. | 25 mm |
Correct Answer:25 mm
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