Khan Academy | Voltage | Physics | Khan Academy @khanacademy | Uploaded July 2024 | Updated October 2024, 6 days ago.
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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

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