Consider the AC circuit shown above, with source impedances and RMS source voltages given. The load impedance internally consists of a combination of resistors, capacitors, and inductors. What is the maximum active power (in watts) which can possibly be dissipated by the load?

Here is the twist: the voltage source in the middle is running in opposite phase (\(180^o\) off) relative to the other two sources, which are in phase with each other.

This problem is based on Steven Chase's problem with a similar title.

HINT: Use Kirchhoff's laws to deduce a simple equivalent circuit, consisting of one voltage source and one impedance..

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