Monday, August 24, 2015

electromagnetism - Magnetic Potential Energy


Does a charged rod or a shell have a magnetic potential energy when it is kept in a uniform magnetic field?


Also, can anyone quantitatively explain why a wire loop carrying current would tend to be circular?




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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 \...