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NEET2003PhysicsThermal Properties of MatterActual

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

Options

  1. A4 3 K
  2. B2 K
  3. C3 ~K
  4. D2 3 K

Correct answer

A. 4 3 K

Step-by-step solution

2 l K_ e g (A) = l 2 K A + l K A for series connection R = R ₁+ P ₂ K_ e g = 4 3 K

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