Two rods of equal length and diameter have thermal conductivite 3 and 4 units respectively. If they are joined in series, the thermal conductivity of the combination in the given units would be
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Answer:As we know that both rods are joined in series, so equivalent thermal conductivity will be K
1
+K
2
Now, we know that
R=
KA
L
So,
K
equivalent
2L
=
K
1
L
+
K
2
L
K
equivalent
2L
=
3
L
+
4
L
K
equivalent
=
7
24
$${K}_{equivalent}= 3.43$$
Explanation:
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