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JEE Main20204 Sep 2020Morning ShiftPhysicsUnits and DimensionsActual

Dimensional formula for thermal conductivity is (here K denotes the temperature):

Options

  1. AMLT – 2 K
  2. BMLT – 2 K – 2
  3. CMLT – 3 K
  4. DMLT – 3 K – 1

Correct answer

D. MLT – 3 K – 1

Step-by-step solution

k = Q / t Δ x A Δ T = M 1 L 2 T − 2 L L 2 K T = M 1 L 1 T − 3 K − 1

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