. An electron moves in the negative x-direction, through a uniform magnetic field in the negative y-direction. The magnetic force on the electron is: A. In the negative x-direction B. In the positive y-direction C. In the negative y-direction X D. In the positive z-direction E. In the negative z-direction OA OEO The figures showthe circular paths of two particles that travel at the same speed in a uniform magnetic field B, which is directed into the page. One particle is a proton; the other is an electron (which is less massive]. Which figure is physically reasonable? )0\" ' x3 x >