Two rods of thermal resistances 5 K W⁻¹ and 10 K W⁻¹ are joined in parallel. Their equivalent thermal resistance is ______ K W⁻¹.
Physics · Mixed Chapter
JEE Main Practice

Question

Two rods of thermal resistances 5 K W⁻¹ and 10 K W⁻¹ are joined in parallel. Their equivalent thermal resistance is ______ K W⁻¹.

G1 Physics · Accepted Answer

Step 1: Parallel thermal conductances add: 1/Rₑq = 1/R₁ + 1/R₂. Step 2: 1/Rₑq = 1/5 + 1/10 = 3/10 W K⁻¹. Step 3: Rₑq = 10/3 ≈ 3.333 K W⁻¹. Final answer to one decimal place (as PDF key): 3.3 K W⁻¹.