1.

Four identical rods which have thermally insulated lateral surfaces are joined at point A. Points B,C,D & E are connected to large reservoirs. If heat flows into the junction from point B at rate of 1W and from point C at 3 W inside, flows out from D at 5 w, which relation (s) is//are correct for temperature of these points?

Answer»

`T_(A) lt T_(E)`
`T_(B) = T_(C)`
`T_(C) gt T_(D)`
`T_(B) = T_(E)`

SOLUTION :Heat FLOW
At A `x+1+3=5`
`x=1` Heat in FLOWS from E
`T_(E) gt T_(A)`
`T_(C) gt T_(A) gt T_(D)`
`T_(B)-T_(A)=T_(E)-T_(A)`
`T_(B)=T_(E)`


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