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

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

### Right Answer is: 0

#### SOLUTION

Coefficient of coupling is given by

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

Where

L_{1} and L_{2} = 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**