Thursday, March 24, 2016

homework and exercises - EM vector potential


We can write the electromagnetic field tensor as [0Ex/cEy/cEz/cEx/c0BzByEy/cBz0BxEz/cByBx0]=Fμν.

Erick J. Weinberg, Classical Solutions in Quantum Field Theory: Solitons and Instantons in High Energy Physics (p. 43), states:



For a static solution with vanishing electric fields F0j, and hence A0=0, [...]



How can this be proven?



Answer



EDIT: Answer was incorrect. So it was removed


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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 \...