Six identical conducting rods are joined as shown in figure. Points A and D are maintained

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10-2.Transmission of Heat

normal

Six identical conducting rods are joined as shown in figure. Points $A$ and $D$ are maintained at temperatures $200\,^oC$ and $20\,^oC$, respectively. the temperature of junction $B$ will be......... $^oC$

$120$

$100$

$140$

$80$

Solution

Resistance of all identical rods are same.

$\mathrm{H}_{1}=\mathrm{H}_{2}=\mathrm{H}_{3}$

$\frac{\mathrm{KA}\left(200-\theta_{1}\right)}{\ell}=\frac{\mathrm{KA}\left(\theta_{1}-\theta_{2}\right)}{\ell}=\frac{\mathrm{KA}\left(\theta_{2}-20\right)}{\ell}$

$\theta_{1}=140^{\circ} \mathrm{C} \quad \theta_{2}=80^{\circ} \mathrm{C}$

Standard 11

Physics

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normal

Six identical conducting rods are joined as shown in figure. Points $A$ and $D$ are maintained at temperatures $200\,^oC$ and $20\,^oC$, respectively. the temperature of junction $B$ will be......... $^oC$

Solution

Similar Questions

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