Is the term "loop" loosely defined in Faraday's law? A voltage will be induced in a loop of wire when the magnetic field flux through the loop changes If you're reading this, you probably know what happens when you hook up the leads from an oscilloscope to a microphone. Nothing, lol. There needs to be relative motion between the voicecoil and the permanent magnet for you to view any voltage fluctuations. And here is the origin of my confusion, Disconnect the leads. The voicecoil is now open ended. In other words, it is NO LONGER a true loop. Will a voltage still be induced? Also, voltage is a measure between two points or ends in the case of a voice coil. How am I supposed to find the "ends" in a circle?