I encountered two contradicting answers in TBR for two different passages. One questions pertains to a a mass spectrometer w/ different charged and uncharged atoms being passed through the field. This question asks: (Q47) In the apparatus of experiment 1, which particle will be most deflected? Choices A, C, and D all have charge and mass. However, one choice (B) is ruled out because it has no charge. They explain, "Choice B should be eliminated immediately, because Ne is not deflected, given that it has no net charge." Here is the next question which can be answered by basic knowledge on E&M. The question says: (Q60) A straight current-carrying conductor has no net charge on it and generates its own magnetic field. When immersed in an external magnetic field, it is subjected to: The answers consisted of: a force due to its own magnetic field, an external magnetic field, both or neither at all (since it has no net charge). The correct answer here was that it experiences a force due to an external magnetic field. For this question, they responded that magnetic forces depend on moving charges, not on net charges. The current in a conductor is moving charges, so the current experiences a force from the external magnetic field. I'm confused with both of these explanations. I tried to reason this out myself, but I would like some confirmation if possible, preferably from someone whose very knowledgeable with this topic: Neon, a single atom has no net charge so it doesn't experience a magnetic force due to the magnetic field. In the later situation, the wire consists of a "sea of electrons" and though the wire itself is electrically neutral, each individual electron does have a net charge. Because these electrons are moving (the question states theres a current), these electrons / the current, experiences a magnetic force due to some external magnetic field. Does this sound about right? Thanks in advance!