We studied the induction of an electromotive force caused by the magnetic field of a solenoid at various coils placed inside it. We used an experimental setup - provided by the learning laboratory infrastructure of the Physics Department at FCUP - to determine the dependence of the induced electromotive force with very different experimental variables, namely: number of coil turns, coil cross-sectional area, coil axis angle, angular frequency of the signal, and signal amplitude of current. The value of the vacuum permeability was determined, using this same method, and compared with the known value. This study aimed to develop a new pedagogical approach of the laws of electromagnetic induction. It also made a reflection on how to approach this experience in secondary education and what are the best techniques to perform, explore and evaluate the activity.
electromotive force; solenoid; electromagnetic induction; coil
