The wax melts up to the length 15 cm and 30 cm for two identical rods of different metals in Ingen Hausz apparatus. The ratio of thermal conductivities is :

The wax melts up to the length 15 cm and 30 cm for two identical rods

1.	The wax melts up to the length 15 cm and 30 cm for two identical rods of different metals in Ingen Hausz apparatus. The ratio of thermal conductivities is :
Answer» `2:3` `1:2` `1:4` `4:1` Solution :Here `(k_(1))/(k_(2))=(l_(1)^(2))/(l_(2)^(2))=((15)/(30))^(2)` `rArr(k_(1))/(k_(2))=1/4` Thus correct CHOICE is (C ).

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The wax melts up to the length 15 cm and 30 cm for two identical rods of different metals in Ingen Hausz apparatus. The ratio of thermal conductivities is :

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