The variable resistor in the circuit attached is adjusted for maximum power transfer to R0. A. Find the numerical value of R0. B. Find the maximum power delivered to R0. C. How much power does the 180 V source deliver to the circuit when R0 is adjusted to the value found in A?

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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.