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What is the coupling coefficient k of the following magnetically coupled circuit? Are the two coils loosely coupled or tightl

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Answer #1

K = 0.4 - loosely coupled

We know,

M = k ✓L1L2

M= 2 H , L 1 = 5 H, L2 = 5 H

✓5*5 = 5 H ( suare root of 25 = 5)

K = 2/ 5 = 0.4

As k is less than 0.5 , it's loosely coupled.

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