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Que. The quantity d t/Q for conduction of heat through a body i.e. spherical in shape is
a. ln (r2/r1)/2πLk
b. ln (r2/r1)/πLk
c. ln (r2/r1)/2Lk
d. ln (r2/r1)/2πk
Correct Answer:ln (r2/r1)/2πLk
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