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Q.

The temperature at the two ends A and B of a rod of length 25 cm and circular cross-section are 1000C and 00C, respectively. In the steady state, the temperature at a point 10 cm from the end B is (Ignore loss of heat from curved surface of the rod)

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a

600C

b

800C

c

900C

d

400C

answer is D.

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Detailed Solution

From the equation, θx=ΔtlGiven,  t1=100∘C,t2=0∘C,l=25cm and x=10cmθ10=100−025⇒θ10=4⇒θ=40∘C
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