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NEET2010PhysicsThermal Properties of MatterActual

Consider a compound slab consisting of two different materials having equal lengths, thicknesses and thermal conductivities K and 2 K respectively. The equivalent thermal conductivity of the slab is

Options

  1. A2 K
  2. B3 K
  3. C4 3 K
  4. D2 3 K

Correct answer

C. 4 3 K

Step-by-step solution

Equivalent thermal conductivity of the compound slab, aligned K_ eq & = l₁+l₂ l₁ K₁ + l₂ K₂ = l+l l K + l 2 K & = 2 l 3 l 2 K = 4 3 K aligned

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