The quantity d t/Q for conduction of heat through a body i.e. spherical in shape is


ln (r2/r1)/2πLk


ln (r2/r1)/πLk


ln (r2/r1)/2Lk


ln (r2/r1)/2πk

Answer: (a).ln (r2/r1)/2πLk

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Q. The quantity d t/Q for conduction of heat through a body i.e. spherical in shape is

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