Introduction to electrical engineering | Electrical Engineering | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/e... The positive sign for current corresponds to the direction a positive charge would move. In metal wires, current is carried by negatively charged electrons. The positive current arrow points opposite the direction the electrons move. This has been the sign convention for 270 years, ever since Ben Franklin name electric charges with + and - signs, 150 years before the discovery of the electron. Watch the next lesson: https://www.khanacademy.org/science/e... Missed the previous lesson? https://www.khanacademy.org/science/e... Electrical engineering on Khan Academy: A summary of the math and science preparation that will help you have the best experience with electrical engineering taught on Khan Academy. Become familiar with engineering numbers and notation, and learn about the two most important electrical quantities: current and voltage. About

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/e... Current is the flow of charge. We measure current by counting the amount of charge passing through a boundary in one second. Watch the next lesson: https://www.khanacademy.org/science/e... Electrical engineering on Khan Academy: A summary of the math and science preparation that will help you have the best experience with electrical engineering taught on Khan Academy. Become familiar with engineering numbers and notation, and learn about the two most important electrical quantities: current and voltage. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to ca