THE 5-SECOND TRICK FOR MX650

Take into account the Particular circumstance of a constructive point cost q in the origin. To work out the likely a result of q in a distance r through the origin relative to the reference of 0 at infinity (remember that we did precisely the same for potential Power), let (P = r) and (R = infty), with (dvec l = dvec r = hat r dr) and use (vec E =