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Two electric bulbs have filaments of lengths L and 2L, diameters 2d and d and also emissivities 3e and 4e respectively. If their temperatures are in the ratio 2:3, the ratio of their powers will be
(1) 8:27
(2) 4:27
(3) 8:3
(4) 4:9
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Two electric bulbs have filaments of lengths L and 2L diameters 2d and d and emissivities 3e and 4e If their temperatures are in the ratio 2:3 their powers will be in the ratio of
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