Thermodynamics: JEE Main 2023 Physics question

JEE Main 2023 · 13 Apr, Evening shift · Q67

JEE Main 202313 Apr, Evening shiftPhysicsHardThermodynamics163× since 2002

Two plates

\mathrm{A}

and

\mathrm{B}

have thermal conductivities

84 ~\mathrm{Wm}^{-1} \mathrm{~K}^{-1}

and

126 ~\mathrm{Wm}^{-1} \mathrm{~K}^{-1}

respectively. They have same surface area and same thickness. They are placed in contact along their surfaces. If the temperatures of the outer surfaces of

\mathrm{A}

and

\mathrm{B}

are kept at

100^{\circ} \mathrm{C}

and

0{ }^{\circ} \mathrm{C}

respectively, then the temperature of the surface of contact in steady state is _____________

{ }^{\circ} \mathrm{C}

Your answerType your answer. Integers and decimals are accepted.

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