A singly charged, positive ion with a mass of 7.65×10 ⁻²⁶ kg is being accelerated from rest through a potential difference of 784 V. The ion enters a magnetic field of 0.015 T along a direction perpendicular to the field. Calculate the radius of the circular path of the ion in the field. Note: "Singly charged" and "positive" means the ion is missing exactly one electron.