Circuits and electromagnetics | Khan Academy
What is electricity, and how is it related to magnetism? Explore the fundamental relationships that power our modern world. **Unit guides are here!** Power up your classroom with engaging strategies, tools, and activities from Khan Academy’s learning experts. [**PDF**](https://bit.ly/3yj24NN)
Overview
Added
March 18, 2026
Subject & domain
physics · dc-circuits
Grade range
Grade 9 (Freshman)–Grade 12 (Senior)
Page kind
Course
Introduction
Unit 7: Circuits and Electromagnetics
- Core Subject: The fundamental relationships between electricity and magnetism and their real-world applications.
- Key Circuit Topics:
- Voltage and current applications.
- Ohm's law calculations.
- Equivalent resistance and simplifying resistor networks.
- Calculating currents and voltages in pure circuits.
- Electromagnetics Applications:
- Electric motors.
- Electromagnetic induction.
- Electric generators.
- Assessment Structure:
- Three section-specific quizzes.
- One comprehensive unit test.
- Additional Resources: Unit guides and classroom strategies available for educators in PDF format.
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