DPP-2JEEMainHeatTransfer-KirchhoffslawWheatstonebridgeRadialCylindricalflowofheatFreezingoflake.pdf

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DPP – 2
Q 1. A metal rod of length 2m has cross sectional areas 2A and A as shown in figure. The
ends are maintained at temperatures 100°C and 70°C. The temperature at middle point
C is
(a) 80 °C (b) 85 °C
(c) 90 °C (d) 95 °C
1
Q 2. Three conducting rods of same material and cross-section are connected as shown in
figure. Temperatures of A, D and C are maintained at 20℃, 90℃ and 0℃. If there is
no flow of heat in AB, then ratio of the lengths of BC and BD is
Q 3. Three rods made of the same material and having the same cross-section have been
joined as shown in the figure. Each rod is of the same length. The left and right ends
are kept at 0 ℃, 90 ℃ and 90℃ respectively. The temperature of junction of the three
rods will be
℃