Monday, June 11, 2018

electricity - In an alternating current, do electrons flow from the source to the device?


If electrons in an alternating current periodically reverse their direction, do they really flow? Won't they always come back to the same position?





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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

I am studying Statics and saw that: The moment of a force about a given axis (or Torque) is defined by the equation: $M_X = (\vec r \times \...