Embibe Experts Solutions for Chapter: Heat Transfer, Exercise 1: AP EAPCET 2019 (21-Apr Shift-2)

Three rods of same dimensions have thermal conductivities $3K, 2K$ and $K$. They are arranged as shown in the figure below. Then in the steady state the temperature of the junction $\text{'}P\text{'}$ is

In a steady state, the temperature at the end $A$ and end $B$ of a $20 \mathrm{cm}$ long rod $AB$ are $100°\mathrm{C}$ and $0°\mathrm{C}$. The temperature of a point, $9 \mathrm{cm}$ from $A$ is

Which of the following is NOT a reversible process?

A liquid of mass $250 \mathrm{g}$ is kept warm in a vessel using an electric heater. The liquid is maintained at $57 °\mathrm{C}$ when the power supplied by the heater is $30 \mathrm{W}$ and surrounding temperature is $27 °\mathrm{C}$. As the heater is switched off, it took $10 \mathrm{s}$ time for the temperature of the liquid to fall from $47 °\mathrm{C}$ to $46.9 °\mathrm{C}$. The specific heat capacity of the liquid is