GATE EE 2015 Set 2 — Question 51
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Question
A composite conductor consists of three conductors of radius each. The conductors are arranged as shown below. The geometric mean radius (GMR) (in cm) of the composite conductor is . The value of is ______.
Correct answer
1.85 to 1.95
Solution
The Geometric Mean Radius (GMR) for a composite conductor with identical strands is given by:For 3 identical strands arranged symmetrically:where (self-GMR of a strand) and (distance between centers).Thus, .
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