1. An electron has a velocity v = (3.00 - 2.00k) 10⁵ m/s when it enters a region where there is a uniform magnetic field B = (-1.20 +4.00k)T. What force does the electron initially experience? 2. A singly charged 24Mg ion (mass=24u) is accelerated from rest by a potential difference of 2.00 x 10³ V and then bent in a uniform magnetic field of 5.00 x 10^-2 T in a mass spectrometer. Find the radius of curvature of the orbit of the ion. Include a diagram show- ing all vectors