Grade 12th passMechanics
a rod of length l and cross section of area A has. a variable conductivity given by k=alpha T
1 Answer
Saurav
"Heat current : `i = - k A (dT)/(dx)`"
"` idx = - kA dT => i in^lt_0 dx = - A 
T2T1 T dT`"
"`=> i l = - A ( T12-T22)/2 => i = ( A ( T22 - T12))/(2l) `"
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