This document contains a series of physics concept tests about electromagnetic induction and Lenz's law. The concept tests cover topics like changing magnetic flux through a loop, induced currents in moving and rotating loops, induced voltages and currents, and how a falling magnet's motion is affected by a nearby loop. For each concept test, the possible multiple choice answers are presented along with an explanation of the correct answer based on Faraday's law and Lenz's law.