Maxwell's Equations
See electric and magnetic fields as one changing, connected system.
Charges and currents are sources. Gauss's law ties electric flux to enclosed charge, while magnetic flux through a closed surface always totals zero.
The four equations are compact source-and-response rules: charges and currents shape fields, while changing fields can themselves become sources. Together they predict electromagnetic waves. Values here are in relative units.
A changing magnetic flux creates a circulating electric field (clockwise here). The minus sign is Lenz's law: the induced circulation opposes the change. That is induction as a field relationship, not a wire-only rule.
Make the idea yours.
Use the model, then answer without looking back. Each check isolates one decision a learner should be able to make after this lesson.