# Introduction

Welcome to electricity and electrical engineering! In this introductory sequence you will become familiar with the most important electrical concepts—charge, current, and voltage. You also learn about the language we use for engineering numbers, units, and notation.

Check out the summary of the math and science preparation that will get you ready for the best experience studying electrical engineering.

Charge, current, and voltage are the cornerstone concepts of electricity. We create our first mental models for these basic electrical quantities.

Current analogy — red and blue soccer players

Charge, current, voltage — the basic electrical quantities

Conventional current vs. electron current

Numbers in electrical engineering

Define the standard electrical units

6 ways to generate electricity

Electric force compared to gravity

Preparing to study electrical engineering

Spinning Numbers $\qquad$ Circuit elements

## Video vs. Article

When you come across a video and article with the same or similar names, they cover roughly the same ideas. Choose the format that helps you learn best. If you view one and have more questions, check out the corresponding article/video, because it may help to see it presented two different ways.