10. The superposition theorem is useful for circuit analysis only in ac circuits.
1. Like Thevenin's theorem, Norton's theorem provides a method of reducing a more complex circuit to a simpler, more manageable form for analysis.
2. Norton's theorem provides a method for the reduction of any ac circuit to an equivalent form consisting of an equivalent voltage source in series with an equivalent impedance.
3. In an ac circuit, power to the load peaks at the frequency at which the load impedance is the complex conjugate of the output impedance.