https://www.khanacademy.org/science/in-in-class10th-physics/in-in-electricity/in-in-electric-current-circuit/v/intro-to-current-amperes 2020-06-23T07:22:43Z Intro to current (& Amperes) Let's explore what electric current is, how we calculate it, and it's unit (Amperes) and it's direction. Mahesh Shenoy video https://cdn.kastatic.org/googleusercontent/ErH1r1EVjq3HoA129b-TwiBeZQbXS3kSHpCZ8AvBKnAUwipMyRsZQ0U5r7fhBDgb2IlJhfRAg_JwWiEnMFhL8X8X Intro to current (& Amperes) Let's explore what electric current is, how we calculate it, and it's unit (Amperes) and it's direction. https://cdn.kastatic.org/ka-youtube-converted/OonLRoptTEM.mp4/OonLRoptTEM.mp4 526 Electric current https://www.khanacademy.org/science/electrical-engineering/introduction-to-ee/intro-to-ee/v/ee-current 2024-05-29T15:36:53.180294047Z Electric current Current is the flow of charge. Copper and silver atoms have loose electrons, making them good conductors. Current is measured by counting charges passing through a boundary per second. It also shows how saltwater conducts current with positive and negative ions moving in opposite directions. Willy McAllister video https://cdn.kastatic.org/googleusercontent/qReGk1pYET53gG33yqvBHpXz40SDQ2gz07dCd4feqpvqSxt9gOvLAkjc7ywEyq6U_ACaNlq2dRokYV0cgiQ3kU4 Electric current Current is the flow of charge. Copper and silver atoms have loose electrons, making them good conductors. Current is measured by counting charges passing through a boundary per second. It also shows how saltwater conducts current with positive and negative ions moving in opposite directions. https://cdn.kastatic.org/ka-youtube-converted/ZRLXDiiUv8Q.mp4/ZRLXDiiUv8Q.mp4 558 Electric current https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:electrical-quantities/x0e04e0cb682fb793:electrical-current/e/finding-electric-current 2026-03-25T20:00:51.494577527Z Finding electric current Let's practice problems involving the relationship between current and flowing charges. Satrajit exercise https://www.khanacademy.org/science/electrical-engineering/introduction-to-ee/intro-to-ee/v/current-direction 2021-03-01T15:43:22Z Current direction The positive sign for current corresponds to the direction a positive charge would move. In metal wires, current is carried by negatively charged electrons, so the positive current arrow points in the opposite direction the electrons move. This has been the sign convention for 270 years, ever since Ben Franklin named electric charges with + and - signs. This convention came about 150 years before the discovery of the electron. Willy McAllister video https://cdn.kastatic.org/googleusercontent/pKZQJAkTSo5fr2PM-2cKnt-lHDjyD9BlyWOld1ihADi7kqq3DhJg4W-VHQUVhEEBno8B2_-Dbx03Kv2GpQgMlE0 Current direction The positive sign for current corresponds to the direction a positive charge would move. In metal wires, current is carried by negatively charged electrons, so the positive current arrow points in the opposite direction the electrons move. This has been the sign convention for 270 years, ever since Ben Franklin named electric charges with + and - signs. This convention came about 150 years before the discovery of the electron. https://cdn.kastatic.org/ka-youtube-converted/4frpZ4Q0q58.mp4/4frpZ4Q0q58.mp4 328 Electric current