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I determined the band gap of an undoped sample of germanium. I Measuring the Hall voltage of both n-type and p-type germanium. Calculated the hall coefficient RH, the carrier
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The Hall Effect in Germanium Abstract 1. I determined the band gap of an undoped sample of germanium. 2. I Measuring the Hall voltage of both n-type and p-type germanium. Calculated the hall coefficient RH, the carrier mobility µH and the carrier concentration, n. Theory The Hall Effect A beam of electrons can be deflected by a magnetic field. Metals are full of free electrons that freely roam around the stationary protons. Edwin H. Hall found that these drifting conduction electrons can also be deflected when a magnetic field is applied. The diagram below taken from "The Fundamentals of Physics" by Halliway, Resnick and Walker, shows the Hall Effect on a strip of metal. A piece of metal, in our case Germanium as a current applied to it, (indicated as i below.) which run from the top to the bottom. Electrons (the charge carriers) drift in the opposite direction to the current at a drift speed...
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