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Two metal rods of same length and same c...

Two metal rods of same length and same cross sectional area are connected in Series. If their conductivities are 120 `Wm^(-1)K^(-1) and 240 Wm^(-1)K^(-1)` then effective conductivity of the combination is

A

150 `Wm^(-1) K^(-1)`

B

180 `Wm^(-1) K^(-1)`

C

200 `Wm^(-1) K^(-1)`

D

160 `Wm^(-1) K^(-1)`

Text Solution

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The correct Answer is:
D
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