Obviously, electric field lines for 2 charges, one stronger than the other, behave like this: https://www4.uwsp.edu/physastr/kmenning/images/pop4.19.f.19.gif. Is there a way to measure angles for particular field lines? For example, the field line at theta=0 is just a straight line going from the positive charge to the negative one. Similarly, theta= 180 goes from the positive charge to negative infinity. Are there similar rules for some arbitrary value of theta? Do any theta values do something interesting besides theta=0 and 180?
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