Magnetic Forces and the DC Electric Motor

The forces on the wire segments of the current loop in an electric motor depends upon the geometry of the loop (relative to the magnetic field) as well as the direction of the current. This animation illustrates those forces and the role of the commutator in switching the current direction so that torque on the loop continues to keep the loop spinning. (Note the direction of each of the side forces is reversed. This error is corrected in the revised version of this animation)

[goldenraspberries]

Thank you! Your videos are so helpful!

[mrg]

Lorenzo De Biasi:  I use POVRay to create the frames of animation and virtualdub to create the animation from the image files.

[lorenzodebiasi]

thanks so much!! easy to understand :) what is the name of the software? thanks again!

[AMANKUMAR-unpg]

May you upload video on magnetic field direction in wire due to ac source(with animation video)

[tfun]

Don’t electrons travel from the negative to the positive side of the battery?

[CuberPortugues]

what about the emf that is induced in the coil? it does not affect the overall principle?

[rohitbhosle]

These forces are lorentz forces right?

[pHrIlLeX]

Those Lorentz Forces on the outer (not relevant parts) of the loop are wrong arent they?