Discussion Forum
Que.  If Q X is heat generated in at distance ‘x’, then heat conducted out at a distance (x + d x) will be 
a.  Q X + 3d (Q X) d x /d x 
b.  2Q X + d (Q X) d x /d x 
c.  d (Q X) d x /d x 
d.  Q X + d (Q X) d x /d x 
Correct Answer:Q X + d (Q X) d x /d x
