### 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.