The magnets in my electric toothbrush help me to clean my teeth everyday. The magnets in the toothbrush provide a magnetic field that is used for the motor. When I turn on the toothbrush, a current runs through the coils of the motor in a path that is perpendicular to the magnetic field. If the current is not perpendicular to the magnetic field, the coil will not feel the maximum force. However, if the current in parallel to the magnetic field, the coil will not feel a force at all. Without the magnets, the head of my toothbrush would not rotate.
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