Two identical bars are conducting heat from a region of higher temperature to on

Question

Two identical bars are conducting heat from a region of higher temperature to one of lower temperature. In arrangement A, the bars conduct 80 J of heat in a certain amount of time. How much heat is conducted in B during the same time?

160 J10 J40 J80 J320 J

Two identical bars are conducting heat from a region of higher temperature to one of lower temperature. In arrangement A, the bars conduct 80 J of heat in a certain amount of time. How much heat is conducted in B during the same time? 160 J 10 J 40 J 80 J 320 J

Explanation / Answer

1.

resistance in case1,

R = L/k

Rnew = L/2k

Req = L/4k

so heat transferred will be

Q = AT/R

so heat = 80*4 = 320J

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