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!
(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!