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  2. Occupation of the Ruhr - Wikipedia

    en.wikipedia.org/wiki/Occupation_of_the_Ruhr

    Acts of violence and accidents caused by the occupying forces had resulted in 137 deaths and 603 injuries by August 1924, shortly before the passive resistance was called off. Monetary damages to the economy of the Ruhr caused by the occupation were estimated at between 3.5 and 4 billion gold marks. [17]

  3. Ohm's law - Wikipedia

    en.wikipedia.org/wiki/Ohm's_law

    If the resistance is not constant, the previous equation cannot be called Ohm's law, but it can still be used as a definition of static/DC resistance. [4] Ohm's law is an empirical relation which accurately describes the conductivity of the vast majority of electrically conductive materials over many orders of magnitude of current.

  4. Drude model - Wikipedia

    en.wikipedia.org/wiki/Drude_model

    The two most significant results of the Drude model are an electronic equation of motion, = (+ ) , and a linear relationship between current density J and electric field E, =. Here t is the time, p is the average momentum per electron and q, n, m , and τ are respectively the electron charge, number density, mass, and mean free time between ...

  5. Electrical resistivity and conductivity - Wikipedia

    en.wikipedia.org/wiki/Electrical_resistivity_and...

    The resistance due to this effect is tiny compared with that of non-superconducting materials, but must be taken into account in sensitive experiments. However, as the temperature decreases far enough below the nominal superconducting transition, these vortices can become frozen so that the resistance of the material becomes truly zero.

  6. Gustav Stresemann - Wikipedia

    en.wikipedia.org/wiki/Gustav_Stresemann

    During his brief chancellorship, he abandoned the policy of passive resistance against the French-Belgian occupation of the Ruhr and introduced the Rentenmark in a (relatively successful) attempt to tame hyperinflation in the country. In November, Stresemann's reshuffled government collapsed after the Social Democrats withdrew from the coalition.

  7. Electrical resistance and conductance - Wikipedia

    en.wikipedia.org/wiki/Electrical_resistance_and...

    Also called chordal or DC resistance This corresponds to the usual definition of resistance; the voltage divided by the current R s t a t i c = V I. {\displaystyle R_{\mathrm {static} }={V \over I}.} It is the slope of the line (chord) from the origin through the point on the curve. Static resistance determines the power dissipation in an electrical component. Points on the current–voltage ...

  8. Alfred Hugenberg - Wikipedia

    en.wikipedia.org/wiki/Alfred_Hugenberg

    In January 1923, when Germany defaulted on its reparations to France, the French premier Raymond Poincaré ordered the occupation of the Ruhr, marking the beginning of "passive resistance" that led to hyperinflation.

  9. Landauer formula - Wikipedia

    en.wikipedia.org/wiki/Landauer_formula

    A generalization of the Landauer formula for multiple terminals is the Landauer–Büttiker formula, [5] [4] proposed by Markus Büttiker [].If terminal has voltage (that is, its chemical potential is and differs from terminal chemical potential), and , is the sum of transmission probabilities from terminal to terminal (note that , may or may not equal , depending on the presence of a magnetic ...