The equation $$emf = -\frac{d\phi}{dt}$$ represents the electromotive force (emf) induced in a circuit due to a change in magnetic flux over time. It captures the fundamental principle that a changing magnetic environment can induce an electric current, which is at the heart of electromagnetic induction. This relationship illustrates how variations in magnetic fields can generate voltage, driving currents in conductive loops and is central to the understanding of how electric generators and transformers operate.
congrats on reading the definition of emf = -dφ/dt. now let's actually learn it.