1. The problem statement, all variables and given/known data Explain what happens in the following situation: You have a loop in the form of a circle and there is a varying magnetic field inside that loop as the following picture illustrates: 2. Relevant equations Faraday's law lorentez force 3. The attempt at a solution I first thought that there is a changing magnetic field inside the loop which is after all a change in flux. But using lorentz force clearly no magnetic field passing through the wires which means there shouldn't be any emf. How to reconcile between the two? Faraday's law requires the whole loop to be "Covered" by a magnetic field? Then I started to think about a transformer, The magnetic field lines pass through the coils by what I have written above there must be an outside magnetic field acting on the wires themselves too. Isn't it weird that lorentz force depend on the magnetic field acting on the wire but faraday's law depend on the magnetic field passing through the whole loop?