Question

two overlapped coils the self induction coefficient of the first is 2 Henry and the second is 18 Henry the mutual induction coefficient is .....

Answer 1

M < or = sqrt L1L2

Answer 2

yes
\[M=k.\sqrt{L_1*L_2}\\where\\0\le k \le1\]

Answer 3

@Vincent-Lyon.Fr , @hysenberg

Is that the rule ? m\[ m \le \sqrt{L _{1} * L _{2}}\]

will be is equal or less to 6 ?

Answer 4

Exactly!

Answer 5

Thanks guys for your help.