Electric current | Physics | Khan Academy скачать в хорошем качестве

Electric current | Physics | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/h... Want to explore more? Check out the full electricity & magnetism playlist here:    • Electricity and magnetism | Physics | Khan...   Electric current is the net rate that charge flows through a cross-sectional area. Current is measured in amperes (A), equivalent to coulombs per second (C/s). Current flows when there is an electric potential difference (voltage) between two points, and there are charge carriers that are free to move between those points. Electrical conductors (metals) contain electrons that are free to move. Electrons are the drifting particles in a current-carrying wire, but conventional current is defined as the direction that positive charge would flow. Sections: 00:00 - Intro 00:15 - What is electric current? 02:10 - Voltage and current 02:38 - Conductors and insulators 03:39 - Simple circuit 05:10 - Electron drift 06:25 - Electrons move from low to high potential 08:54 - Electron current and conventional current 11:23 - Lightning and sparks ------------------ Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate here: https://www.khanacademy.org/donate?ut... Volunteer here: https://www.khanacademy.org/contribut...