How to Calculate Coupling Coefficient Without Mutual Inductance?

[seanhbailey]

Homework Statement

I am trying to find the mtuual inductance between two p-core inductors (they share the same core) but I am not sure how the coupling coefficient would be calculated. I know the inductance of both coils. What else would I have to know in order to calculate the coupling coefficient if I am not given the mutual inductance?

Homework Equations

M = k*sqrt(L1*L2)

where M is mutual inductance, k is coupling coefficient, L1 and L2 are inductances of first and second coils respectively.

The Attempt at a Solution

Dunno.

 

[seanhbailey]

Ok, so I figured out that the coupling coefficient is equal to mutual impedance divided by the square root of the product of the impedances of each inductor. I am not sure if this helps, as I do not know how to calculate mutual impedance.