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An electric cable of aluminium conductor (k = 240 W/mK) is to be insulated with rubber (k = 0.15 W/mK). The cable is to be located in air (h = 6 W/m2). The critical thickness of insulation will be. | |
A. | 25 mm [Correct Answer] |
B. | 40 mm [Wrong Answer] |
C. | 160 mm [Wrong Answer] |
D. | 800 mm [Wrong Answer] |