Embibe Experts Solutions for Exercise 2: EXERCISE

Two metallic rods of equal length and cross-section but thermal conductivities $K_1$ and $K_2$ are welded as shown

The equivalent thermal conductivity of this resulting rod will be

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

A uniform metal ring with centre $C$ has two points $A$ and $B$ maintained at two different constant temperatures. The angle $ACB$ is $\theta$. If it is known that for $\theta =180°$, rate of heat flow from $A$ to $B$ is $1.2 W$, the rate of heat flow for $\theta =90°$ will be

A metallic sphere having inner radius a and outer radius $b$ has thermal conductivity $k=\frac{k_0}{r^2} (a\le r\le b)$. The thermal resistance between inner and outer surface for radial heat flow is