1. The problem statement, all variables and given/known data 24. A uniform magnetic field is in the positive z direction. A positively charged particle is moving in the positive x direction through the field. The net force on the particle can be made zero by applying an electric field in what direction? A. Positive y B. Negative y C. Positive x D. Negative x E. Positive z 2. Relevant equations F = q* (vxB) F = q*E 3. The attempt at a solution The answer for this problem is given and in my book it's given as B. However, I keep getting A. I don't know where I'm going wrong. So if the positive particle is moving in the positive x-direction and the B-field is in the positive z direction, then the resulting magnetic force is in the negative y-direction. And if we want a net force of zero on this positive particle, then it seems like if we apply an electric field in the positive y direction then we could get the net zero force that we're looking for. Is this an incorrect explanation?