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[[/Magnetic force]] in a simple [[commutator|commutated]] motor follows the [[right-hand rule]]: if the index finger shows the direction of [[/electric current]] $I$ (which moves the [[/electric charge]] $q$) and the middle finger shows the direction of [[/magnetic field]] $B$ ([[/flux density]]), then the thumb shows the direction of magnetic force $F$ acting on the moving charge; the force is proportional to the length of wire $l$ exposed to the magnetic field.

The drawing was inspired by:
  * http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magfor.html {accessed 2021-06-08}

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{{tag> Magnetic_force Motor_force Lorentz_force Motors Torque Frame Right-hand_rule Commutator Battery Magnetic_poles Files}}