Q)
(chatquestion)...69.A thin vessel of inner radius r and length L is used to boil a
liquid. There is a heater coil inside the vessel and it maintains
uniform temperature T1. Temperature of surrounding is T2(<T¡).
To prevent heat loss, the cylinder is wrapped in insulator of
thermal conductivity k and thickness h. Rate of heat loss from the
curved surface, is-
2TurkL
2tr k
(1)
(T-T,)
(2)
(T,-T,)
h.L
2nrkL
(3)
In(1+h/r)
2tkL
(L-L)-
(T-T,)
(4)
In(h/r)
1 Answer
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