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AP Physics C: E&M
12.2 Magnetism and Moving Charges
12.1 Magnetic Fields
BeginnerFRQDrawing RepresentationsGraphicalMathematicalConceptual13.5k
Figure 1. An ion entering a region with crossed fields.
Figure 1. An ion entering a region with crossed fields.
A positive ion of mass \(m\) and charge \(+q\) is injected with an initial horizontal speed \(v_0\) into a region of space containing a uniform electric field of magnitude \(E\) and a uniform magnetic field of magnitude \(B\). The electric field is directed toward the bottom of the page, as shown in Figure 1. The ion passes through the region undeflected in a straight line.

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