If we consider the η (efficiency) as the fraction of power dissolved through the load R to power extended with the source, VTH, then it is simple to compute the efficiency of maximum power transfer as The Maximum Power Transfer Theorem Formula is explained below. (b) Rth: Let’s apply Input Resistance Method: Rth_ Let’s apply Input Resistance Method (a) Vth: Open circuit voltage Vth_ Open circuit voltage Determine the maximum power that can be delivered to the variable resistor R. Finally, the maximum power transferred to RL is:Ģ). To obtain maximum power transfer, then, RL=3=Rth. (c) Maximum Power Transfer: now the circuit is reduced to: Result Circuit (b) Rth derivation (by Test Voltage Method): After deactivation & test voltage application, we have: After deactivation & test voltage application
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