The Maximum Power Transfer Theorem is also sometimes referred to as the
"Maximum Power Theorem". It states that in a linear circuit, the maximum amount of power is delivered to the load when the
load resistance (RL) is equal to the
source resistance (RS), or the
Thevenin resistance of the circuit.
In other words, to get the most power from a circuit, the load resistance should match the resistance of the source (or Thevenin equivalent resistance) seen by the load.
This principle is commonly used in electrical engineering to design circuits that efficiently transfer power.