Discussion Forum
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

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
