Electrical engineering

Electric potential energy | Electrostatics | Electrical engineering | Khan Academy-S1E36

Trigonometry review-S1E55

Node voltage method (steps 1 to 4) | Circuit analysis | Electrical engineering | Khan Academy-S1E20

Kirchhoff's current law | Circuit analysis | Electrical engineering | Khan Academy-S1E16

Keep going! Check out the next lesson and practice what you’re learning: https://www.khanacademy.org/science/e... Impedance of two elements in series is a complex number. Impedance terminology: reactance, susceptance, admittance.

Demonstration that Kirchhoff's voltage law applies in the frequency domain. The voltage phase offsets around a loop sum to zero.

Keep going! Check out the next lesson and practice what you’re learning: https://www.khanacademy.org/science/e... Remember the relationship between current and voltage in an inductor and capacitor with the help of ELI the ICE man.

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/e... Visualizing the Fourier expansion of square wave. A square wave can be approximated by adding odd harmonics of a sine wave.

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/e... Finding Fourier coefficients for square wave

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/e... Formula for Fourier coeffients for sine