Two point charges \( -Q \) and \( +Q / \sqrt{3} \) are placed in the xy-plane at the origin \( (...

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Two point charges \( -Q \) and \( +Q / \sqrt{3} \) are placed in the xy-plane at the origin \( (0,0) \) and a point \( (2,0) \) respectively, as shown in the figure. This results in an equipotential circle of radius \( R \) and potential \( V=0 \) in the \( x y \)-plane with its center at \( (b, 0) \). All lengths are measured in meters.
(a) The value of \( R \) is meter.
(b) The value of \( b \) is meter.
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