Teacher: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.
Teacher: Now, understand the problem? Solve this instance: It is an example of linear response theory, analogous to Fourier's law of heat transport, and thus there is a Kubo formula relating the proportionality constant in it to a two-point correlation function of electric currents. Diodes are prominent examples of materials that do not satisfy it, because they permit a flow of current in only one direction. This law can be derived from the Lorentz force with the assumption that there is a drag on charge carriers that is proportional to their velocity. Kirchoff formulated a continuum version of it equating current density to electric field times conductivity of a material. Its most familiar form states that the current through a conductor is proportional to the voltage across it and inversely proportional to resistance. For 10 points, name this law that shares its name with the SI unit of electrical impedance.
Student:
Science