1. The problem statement, all variables and given/known data We have been asked to design an investigation into transformers. The equipment list given is: coils of wire, iron core, ammeter, voltmeter, loudspeaker, signal generator and an oscilloscope. 2. Relevant equations 3. The attempt at a solution I know that you could investigate how changing the number of turns on the primary affects the secondary emf. However, we were asked to try and use all the equipment. What is the point of using a signal generator? Looking online it seems to say to stick to around 50Hz and nothing I have found seems to suggest changing the frequency of the primary current? Could this be done? What could I use the oscilloscope for? Thanks for any help offered.