NEET | 2017Basic Maths and Units and DimensionsHard

Question

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K₁ and K₂. The thermal conductivity of the composite rod will be :-

Options

$\frac{3 (K_{1} + K_{2})}{2}$

K₁ + K₂

2 (K₁ + K₂)

$\frac{K_{1} + K_{2}}{2}$

Solution

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