Back emf (electromotive force)

The video tutorial explains the workings of electric motors, focusing on the concept of magnetic flux and induced EMF. It discusses how the magnetic flux changes as a current-carrying loop rotates in a magnetic field, leading to an induced EMF that opposes the change. The concept of back EMF is introduced, explaining how it affects the current in electric motors and its practical implications, such as dimming lights when motors start. The tutorial also covers the design of motors to maintain constant back EMF using multiple loops and a split ring commutator.

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