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Question 30867
JEE Physics · Medium

Elasticity, Thermal Expansion, Calorimetry and Heat Transfer: Conduction MCQ

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ConductionMediumQuestion 30867

Question

Two slabs (same area, same thickness) of conductivities k₁ and k₂ are in parallel. Effective conductivity is:
  1. A
    (k₁+k₂)/2
    Correct
  2. B
    2k₁k₂/(k₁+k₂)
  3. C
    k₁k₂
  4. D
    k₁+k₂

Correct answer

(k₁+k₂)/2

Explanation

Same temperature difference, conductances add: k_eff = (k₁+k₂)/2 (arithmetic mean) for equal areas.

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