Hi, I am about to sit my Physics A-level paper next week and I have a couple of questions. My first question is rather broad, but what are eddy currents? I understand they're formed in transformers and how their effect is reduced, but I don't understand exactly why they're caused. Am I right in thinking they're somewhat related to Lenz's law in the sense that the induced current will flow in such a direction to oppose the change that caused it? If that's the case then surely the eddy currents should be in the secondary coil and not in the iron core, as the induced emf is only in the secondary coil? Argghhh I'm really confused, I've watched countless videos and read so many websites but I still don't get it. My second question is a little more concise; why does a motor draw less current as it speeds up? Any help would be greatly appreciated, especially to do with the eddy currents - they've been driving me mad for so long! Thanks.