In an experiment using a high-voltage electromagnetic induction device, different stones used in Egyptian megalithic sites reacted in dramatically different ways. Limestone showed a strong response, ...

This is a series of interactive lecture demonstrations with a theme of induction and Faraday's law, typically presented with a series of iClicker questions. Students predict the direction of current ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...