In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Q: One analogue to this rule is named for Hopkinson and has constant of proportionality the reluctance; this rule and Hopkinsons law may be combined for a circulating magnetic field in a plasma to analyze a namesake form of heating. A generalization of this equation states that the current density equals the sum over n from 1 to infinity of the nth conductivity tensor acting on the nth direct product of the electric field; truncating to first order gives the microscopic form of this law, j equals sigma E, which may be averaged to give the more familiar lumped circuit form. For 10 points, name this physical law that says that the voltage drop is the current times the resistance, or V equals I R; a law named for a German high school teacher.

A: Science
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Q: Instead of employing the Debye-Hull-Scherrer powder method, its namesakes relied on an array of atomic planes. Its namesakes built a vacuum apparatus and employed a hot filament, an accelerating electrode, and an arc-mounted Faraday box. A leak in the vacuum led its namesakes to heat the target, resulting in crystallized nickel, which gave startling results. A plot of collector current against beam energy was explained by constructive interference, and the results in general could be derived by combining Bragg's equation with the de Broglie wavelength for electrons. FTP name this experiment named for two physicists, which proved that electrons diffract.

A: Science
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Q: One possible cooperative example of this effect is the vibronic theory of ferroelectricity, an idea that was first suggested by Bersuker. Longuet-Higgins was responsible for the first demonstration of this effect in optic spectroscopy by calculating energy levels of a system with the E-e problem. This effect is similar to the RTE, and the pseudo type of this is demonstrated in the stereochemical non-rigidity of molecules and ions as well as in fluxional behavior. This is most often encountered in octahedral complexes of the transition metals as well as six-coordinate copper II complexes. For ten points, name this doubly-eponymous effect where non-linear molecules experience a geometrical distortion under certain conditions.

A:
Science
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