https://www.khanacademy.org/science/in-in-class10th-physics/in-in-magnetic-effects-of-electric-current/magnets-and-magnetic-fields/e/magnetic-field-lines--special-properties 2021-05-17T03:42:34Z Magnetic field lines: special properties Let's practice problems to understand two special properties of magnetic field lines that are essential to how magnetic fields behave. Satrajit exercise https://www.khanacademy.org/science/ap-physics-2/x0e2f5a2c:magnetism-and-electromagnetism/x0e2f5a2c:magnetic-fields/e/magnetic-field-lines--properties 2026-04-07T23:55:07.30621384Z Magnetic field lines: direction Let's test our understanding of the properties of magnetic field lines. Satrajit exercise https://www.khanacademy.org/science/in-in-class10th-physics/in-in-magnetic-effects-of-electric-current/magnets-and-magnetic-fields/e/magnetic-field-lines--field-strength 2026-04-08T00:36:09.500768563Z Magnetic field lines: field strength Let's practice problems to understand what the closeness of magnetic field lines at a point tells us about the strength of the magnetic field there. Satrajit exercise https://www.khanacademy.org/science/in-in-class10th-physics/in-in-magnetic-effects-of-electric-current/force-on-current-carrying-wire-in-magnetic-field/e/force-on-a-current-in-a-magnetic-field 2026-04-07T23:17:37.123726494Z Force on a current in a magnetic field Let's solve some problems to better understand the factors that affect the force on a current in a magnetic field. Satrajit exercise https://www.khanacademy.org/science/up-class-12-physics/x0958a876c1afdc76:moving-charges-and-magnetism/x0958a876c1afdc76:magnetic-force-on-a-current-carrying-conductor/v/magnetism-5 2021-05-17T03:42:39Z Magnetic force on a current carrying wire Sal derives the formula F=ILB to determine the force on a current carrying wire. Sal Khan video https://cdn.kastatic.org/googleusercontent/XLPdpjRIt7Pxn0ghfvG9aBglb5OmEE1Nk9FRKY4PogGR0D3jrxzD_OwQh3CVaLb6EsH380M9x1dmi2vAR_G5BMbqvQ Magnetic force on a current carrying wire Sal derives the formula F=ILB to determine the force on a current carrying wire. https://cdn.kastatic.org/ka-youtube-converted/jQ2nD8ZGeEw.mp4/jQ2nD8ZGeEw.mp4 655 Magnetic fields https://www.khanacademy.org/science/up-class-12-physics/x0958a876c1afdc76:moving-charges-and-magnetism/x0958a876c1afdc76:magnetic-force-on-a-current-carrying-conductor/e/force-on-a-current-carrying-wire-in-a-magnetic-field 2026-04-08T00:36:09.500768563Z Force on a current-carrying wire in a magnetic field (intermediate) Let's solve some problems to better understand how to calculate the effect of a magnetic field on a current-carrying wire. exercise