Test Charge Frame

Some articles on charges, frame, test charge:

Relativistic Electromagnetism - The Origin of Magnetic Forces
... can be represented by the evenly spaced positive charges, moving to the right, whilst an equal number of negative charges remain at rest ... electrostatically neutral, the distance between adjacent positive charges must be the same as the distance between adjacent negative charges ... Assume that in our 'lab frame' (Figure 5), we have a positive test charge, Q, outside the wire, traveling parallel to the current, at the speed, v, which is equal to the speed of the moving charges in ...

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