What occurs when magnetic flux through a coil changes?

When the magnetic flux through a coil changes, it induces an electromotive force (EMF) in the coil according to Faraday's law of electromagnetic induction. This induced EMF results in an electric current if the circuit is closed, which is referred to as the induction current. The principle underlying this phenomenon is that a change in magnetic flux through a coil produces a current in the coil itself. This is a fundamental concept in electromagnetism, illustrating how changing magnetic fields can lead to the flow of electric charge.

In contrast, the other options do not describe the direct consequence of changing magnetic flux. Total resistance may change in response to other factors, such as temperature or material properties, but it is not a typical result of changing magnetic flux itself. Similarly, while the flow of electrons can be influenced by various conditions, changing magnetic flux specifically leads to increased current rather than a decreased flow. As for magnetic field strength, it does not inherently decrease as a result of flux changes; instead, the induced EMF and current relate to the flux's alteration. Therefore, the generation of an induction current is the immediate and specific result of a change in magnetic flux through a coil.