First slide

Conduction

Question

In steady state condition, the temperatures at the two ends of a metal rod of length 25 cm are 100°C and 0°C. Then temperature at a point 8cm from the hot end is

Easy

A

68°C
B

40°C
C

32°C
D

60°C

Solution

$\large \frac {\theta_1-\theta_2} {(l/K_A)}\;\dot{Q}=constant$
$\large \frac{100-\theta}{8}=\frac {\theta-0}{17}\Rightarrow \theta =68^0C$

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