Given : Vs : 500 volt RI :3 ohm X1 :5 ohm R2 : 0,03 ohm X2 :0,05 ohm Rc : 150 ohm Xm : 750 ohm Question : a) The amount of load voltage (VL) when loaded ZL (lamp 20 W / 220V) b) The amount of load voltage (VL) at zero load.

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Maximum power transfer theorem

A resistive load will consume maximum power from a network when the load resistance is equal to the resistance of the network as viewed from the open-circuit terminals, with all energy sources removed leaving only the internal resistances. Physicist Moritz von Jacobi introduced the maximum power transfer theorem in 1940. Therefore, this theorem is also known as Jacobi's law.