Electricity and magnetism | Physics | Khan Academy - Voltage (electric potential difference) | Physics | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/science/highschool-physics/x6679aa2c65c01e53:electromagnetics/x6679aa2c65c01e53:voltage-and-current/v/what_is_voltage Want to explore more? Check out the full electricity & magnetism playlist here: https://www.youtube.com/playlist?list=PLSQl0a2vh4HAtw9UfXpWWFRfheZYwHptr The electric potential at a point represents the electric potential energy per unit charge that a particle would have at that location. The difference in electric potential between two points is called voltage. It's measured in volts (V), equivalent to joules per coulomb (J/C). When comparing two points, the point with the higher electric potential is labelled positive (+), and the point with the lower electric potential is negative (-). If two points are at the same electric potential, the voltage between them is zero. Sections: 00:00 - Intro 00:22 - Intuition for voltage using gravity 04:34 - Understanding voltage 07:43 - Positive and negative voltage 08:34 - Why should we care about voltage? 09:42 - Voltage is always between two points 10:18 - Why birds can stand on electric lines ------------------ 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?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc