[SOLVED] Electromagnetic induction 1. The problem statement, all variables and given/known data You are given the following apparatus: copper ring, battery, variable resistor, lengths of insulated copper wire with connecting terminals at each end. Describe, how you would use all of this apparatus to induce a current in the copper ring. 3. The attempt at a solution See the attachment for the right answer and for what I would say. I would say that the wire does not need to touch the loop because by altering the resistance, current changes so magnetic field changes through the loop. This change in magnetic field changes the magnetic flux. Since the rate of change of flux through loop is proportional to emf, current would be produced in the copper loop. Please, say your opinion to my attempt at a solution.