Question

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

Answer 1

Explanation:

R=ρl/A

ρ=RA/L

1/ρ=conductivity k

k=L/RA

k effective=1/k1+1/k2

k eff =k1 k2/k1+k2

=120×240/360

k eff =80

Answer 2

Answer:

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