Register

GATE2016-2-15

• recategorized by
0 votes
0 votes

A hollow cylinder has length $L$, inner radius $r_1$, outer radius $r_2$, and thermal conductivity $k$. The thermal resistance of the cylinder for radial conduction is

  1. $\dfrac{\ln(r_2/r_1)}{2\pi kL} \\$
  2. $\dfrac{\ln(r_1/r_2)}{2\pi kL} \\$
  3. $\dfrac{2\pi kL}{\ln(r_2/r_1)} \\$
  4. $\dfrac{2\pi kL}{\ln(r_1/r_2)}$
• recategorized by
User Avatar

Please log in or register to answer this question.

← PreviousNext →
← Previous in categoryNext in category →
Answer:

Related questions

0 answers
0 votes
Arjun asked Feb 24, 2017
GATE2016-2-21
In the phase diagram shown in the figure, four samples of the same composition are heated to temperatures marked by $a, b, c$ and $d$. At which temperature will a sample get solutionized the fastest? $a$ $b$ $c$ $d$
In the phase diagram shown in the figure, four samples of the same composition are heated to temperatures marked by $a, b, c$ and $d$.At which temperature will a sample g...
0 answers
0 votes
Arjun asked Feb 24, 2017
GATE2016-2-53
For the situation shown in the figure below the expression for $H$ in terms of $r$, $R$ and $D$ is $H=D+\sqrt{r^2+R^2}$ $H=(R+r)+(D+r)$ $H=(R+r)+\sqrt{D^2-R^2}$ $H=(R+r)+\sqrt{2D(R+r)-D^2}$
For the situation shown in the figure below the expression for $H$ in terms of $r$, $R$ and $D$ is $H=D+\sqrt{r^2+R^2}$$H=(R+r)+(D+r)$$H=(R+r)+\sqrt{D^2-R^2}$$H=(R+r)+\sq...
0 answers
0 votes
Arjun asked Feb 24, 2017
GATE2016-2-52
The surface irregularities of electrodes used in an electrochemical machining (ECM) process are $3 \: μm$ and $6 \: μm$ as shown in the figure. If the work-piece is of pure iron and $12V \: DC$ ... $F_e^{+2}$ and the Faraday constant to be $96500$ Coulomb.
The surface irregularities of electrodes used in an electrochemical machining (ECM) process are $3 \: μm$ and $6 \: μm$ as shown in the figure. If the work-piece is of ...
Voting & Accepting an answer helps improve the community
Link Copied!