Whats the application of compensation theorem?

Question

like maximum power transfer is used in stereo-type designs

in which way it is used ?

Answer 1

In solving circuits with many branches in a simple way.

Compensation Theorem

If the impedance Z of a branch in a network in which a current I flows is changed by a finite amount dZ, then the change in the currents in all other branches of the network may be calculated by inserting a voltage source of -IdZ into that branch with all other voltage sources replaced by their internal impedances.