# Lesson 16 — Complex Math and Impedance

<p class="block-synopsis">Rectangular and phasor form, the sinusoid-to-phasor transform, impedance, and why every Block 1 tool still works.</p>

**Objectives covered**

- **2.3** — I can model capacitors and inductors as complex resistors and use circuit analysis tools (such as voltage dividers, Ohm’s Law, and the power equation) to calculate voltage, current, and power in AC circuits containing these components.

<div class="block-toc">
  <a class="bt-card bt-reading" href="../Block2Reading/Obj03/ECE215_B2_Obj03_Reading.html">
    <span class="bt-kind">Reading</span>
    <h4>Complex Math and Impedance</h4>
    <p>The course reading for Objective 2.3.</p>
  </a>
  <a class="bt-card bt-flashcards" href="L16_Flashcards.html">
    <span class="bt-kind">Flashcards</span>
    <h4>Review deck</h4>
    <p>Key terms, equations, and ideas from this lesson, in a self-test deck.</p>
  </a>
  <a class="bt-card bt-slides" href="../_static/slides/ECE_215_Lesson16.pdf">
    <span class="bt-kind">Slides</span>
    <h4>Lesson 16 deck</h4>
    <p>The slides used in class, as a PDF.</p>
  </a>
  <a class="bt-card bt-practice" href="../downloads.html">
    <span class="bt-kind">Practice Problems</span>
    <h4>Work these before the quiz</h4>
    <p>Ungraded problems with answers, on the downloads page.</p>
  </a>
</div>

