query: Where did the idea that there *might* be magnetic monopoles come from?
positive_passages.docid: 13106
positive_passages.text: Why do physicists believe that there exist magnetic monopoles?
negative_passages.docid: 109590
negative_passages.text: Work done by the Magnetic Force
negative_passages.docid: 144876
negative_passages.text: Potential for a general fictitious force?
negative_passages.docid: 128759
negative_passages.text: Why don't we define potential due to a magnetic field?
negative_passages.docid: 127140
negative_passages.text: Why does magnet attract iron but not other metals?
negative_passages.docid: 21201
negative_passages.text: Magnetostatic energy density -- derivation without introducing inductance?
negative_passages.docid: 111964
negative_passages.text: Magnetic field lines vs. Electric field lines
negative_passages.docid: 12924
negative_passages.text: How to derive Maxwell's equations from the electromagnetic Lagrangian?
negative_passages.docid: 82414
negative_passages.text: Conceptually speaking, why does synchrotron radiation arise?
negative_passages.docid: 129289
negative_passages.text: What is the origin of the factor of $-1/4$ in the Maxwell Lagrangian?
negative_passages.docid: 84827
negative_passages.text: Why is the magnetic field of a spherically symmetric current zero?
negative_passages.docid: 12758
negative_passages.text: Magnets arranged in a sphere
negative_passages.docid: 120490
negative_passages.text: Does magnetic monopole violate $U(1)$ gauge symmetry?
negative_passages.docid: 118902
negative_passages.text: What does the magnetic field of the (quantum-mechanical) electron look like?
negative_passages.docid: 90697
negative_passages.text: Is there a heuristic explanation for the derivation of Heisenbergs Uncertainty Principle from String Theory?
negative_passages.docid: 5663
negative_passages.text: Have we directly observed the electric component to EM waves?
negative_passages.docid: 102253
negative_passages.text: How permanent magnets work?Are they working with motion of electrons?