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Physics · PYQ NEET UG 2017
हिन्दीTwo rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are \( K_1 \) and \( K_2 \). The thermal conductivity of the composite rod will be:
Correct answer · Option 1
\( \frac{K_1 + K_2}{2} \)
Explanation
For parallel combination of thermal slabs of equal cross-sectional area and length, equivalent thermal conductivity is \( K = \frac{K_1 + K_2}{2} \).
