# For magnetically isolated coils, the value of coefficient of coupling is:

For magnetically isolated coils, the value of coefficient of coupling is:

#### SOLUTION

Coefficient of coupling is given by

$k = \frac{M}{{\sqrt {{L_1}{L_2}} }}$

Where

L1 and L2 = self-inductance

M = Mutual inductance

For isolated coil, M = 0

Coefficient of coupling will be

$k = \frac{0}{{\sqrt {{L_1}{L_2}} }}$

As the coil is magnetically isolated so its coefficient of coupling will be zero. K = 0

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