Two coils of self-inductances 6mH and 8mH are connected in series and are adjusted for highest coefficient of coupling. Equivalent self-inductance L for the assembly is approximately

Two coils of self inductance 1 H and 3H are connected in series to support each other. Their mutual inductance is 6H. What is the self inductance of the combination ?

Three coils of self inductance, 5, 10 and 15 Mh are connected first in series an then in parallel. What is the ration of the net inductance in the two cases?

Two identical coils each of self-inductance L , are connected in series and are placed so closed to each other that all the flux from one coil links with the other. The total self-inductance of the system is

Two identical coils each of self-inductance L , are connected in series and are placed so closed to each other that all the flux from one coil links with the other. The total self-inductance of the system is

Two coils having self inductance L_1 = 75 mH and L_2=55 mH are coupled with each other. The coefficient of coupling (K) is 0.75 . Calculate the mutual inductance (M) of the two coils.

The coefficient of self inductance of a coil is