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A composite rod is made of two materials X
and Y and its two ends are maintained at
100 °C and 0°C respectively, as shown in
figure 7.
34.
100 °C
0°C
y = 75.0 cm
Figure 7
x= 25.0cm
If the composite rod is well lagged, what is
the ratio of the conductivity of y to that of x?
A 1:2
в 2:1
C 1:1
D 1:4
D

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