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physics ncert solutions class 11th Physics Class 11th Thermal Properties of Matter

11.2 Two absolute scales A and B have triple points of water defined to be 200 A and 350 B. What is the relation between T_A and T_B ?

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Payal Gupta | Contributor-Level 10

5 months ago

11.2 Triple point of water on absolute scale A, $T_{1}$ = 200 A

Triple point of water on absolute scale B, $T_{2}$ = 350 B

Triple point of water on absolute Kelvin scale, $T_{k}$ = 273.15 K

The temperature 273.15 K on Kelvin scale is equivalent to 200 on absolute scale A

$T_{1} = T_{k}$

200 A = 273.15 K, Therefore A = $\frac{273.15}{200}$

Similarly B = $\frac{273.15}{350}$

If $T_{A}$ is the triple point of water on scale A and $T_{B}$ is the triple point of water on scale B, we have

$\frac{273.15}{200}$ $* T_{A}$ = $\frac{273.15}{350} *$ $T_{B}$

$T_{A} =$ $\frac{200}{350} *$ $T_{B}$ = $\frac{4}{7} *$ $T_{B}$

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This is a multiple choice answer as classified in NCERT Exemplar

(b), (c), (d) When the hot milk in the table is transferred to the surroundings by conduction, convection and radiation.

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