instruction:
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.
question:
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.
answer:
Science

question:
One member of this phylum, Strongylocentrotus purpuratus, is often used to study developmental processes, and another, Pisaster ochraceus, is an example of a keystone species. Most members of this phylum have pedicellariae that possess three jaws, and some have a chewing apparatus known as Aristotle's lantern. Members of class Asteroidea of this phylum have an ambulacral groove, and the madreporite is the entrance to their water vascular system that includes tube feet. FTP name this phylum whose "spiny skinned" members have radial symmetry and include sand dollars, sea urchins, and sea stars.
answer:
Social Science

question:
The slow movement of this composer's cello concerto features a duet between the soloist and the principal cellist of the orchestra. One of his solo piano works originally contained an extra five Variations which were restored by Brahms, and that work is based on a theme by Baron von Fricken. Much of this composer's music criticism is structured as a conversation between a character representing his passionate side and one representing his dreamy side. This composer, who created (*) Florestan and Eusebius, also wrote the Symphonic Etudes as well as another piano collection with movements called "The Rocking Horse Knight" and "Traumerei." For 10 points, name this German composer of Carnaval and Kinderszenen, many of whose works were premiered by his wife Clara.
answer:
Fine Arts