# Two inductors of 5 H and 4 H have a mutual inductance of 2.5 H between them. The coupling coefficient is

Two inductors of 5 H and 4 H have a mutual inductance of 2.5 H between them. The coupling coefficient is

#### SOLUTION

Given

L1 = 5H

L2 = 4H

M = 2.5H

The coupling coefficient of Inductor is given as

$\begin{array}{l}K = \dfrac{M}{{\sqrt {{L_1}{L_2}} }}\\\\K = \dfrac{{2.5}}{{\sqrt {5 \times 4} }}\end{array}$

K = 2.5/√20

K = 0.56H

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