NEET2017Physics-Thermal Conductivity
NEET 2017 Physics Heat Transfer MCQ Question
Type: MCQ-conceptual-Medium-Class 11
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
A
(K₁ + K₂) / 2
B
2 / (3(K₁ + K₂))
C
K₁ + K₂
D
2(K₁ + K₂)
Correct Answer
Option A
Detailed Explanation
The effective thermal conductivity of two rods in series is the average of their individual conductivities.
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