query: How to find the magnetic field in a toroid with time-dependent current $I(t)$?
positive_passages.docid: 156100
positive_passages.text: Toroid with variable current and Ampere's Law
negative_passages.docid: 25164
negative_passages.text: Velocity-Dependent Potential and Helmholtz Identities
negative_passages.docid: 35534
negative_passages.text: Magnetic field lines
negative_passages.docid: 31264
negative_passages.text: What happens to the magnetic field in this case?
negative_passages.docid: 29077
negative_passages.text: current in wire + special relativity = magnetism
negative_passages.docid: 80627
negative_passages.text: Evolution operator for time-dependent Hamiltonian
negative_passages.docid: 78939
negative_passages.text: Parametrisation of the surface a torus
negative_passages.docid: 338
negative_passages.text: How do moving charges produce magnetic fields?
negative_passages.docid: 79319
negative_passages.text: force on a moving charge in magnetic field
negative_passages.docid: 156615
negative_passages.text: Question on the relation between Transformer's primary and secondary coil current
negative_passages.docid: 36926
negative_passages.text: Inducing an intense varying magnetic field with a coil and audio amplifier
negative_passages.docid: 83567
negative_passages.text: Is Biot-Savart Law valid for time-varying currents unlike Ampere's law?
negative_passages.docid: 128329
negative_passages.text: Magnetic force on a charged particle viewed from 2 inertial frames
negative_passages.docid: 153288
negative_passages.text: Deriving electric field
negative_passages.docid: 48631
negative_passages.text: Does the magnetic field due to the current from a motional emf induce a counter emf?
negative_passages.docid: 53441
negative_passages.text: Simple explanation to the induction from the slowly changing $\vec B$ of a solenoid in the region of $0$ magnetic field
negative_passages.docid: 141750
negative_passages.text: Finding the steady state solution of a damped oscillator