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In this experiment, the Hall Effect will be used to study some of the physics of charge transport in metal and semiconductor samples. In 1879 E. H. Hall observed that when an electrical current passes through a sample placed in a
His measurements of the tiny effect produced in the apparatus he used were an experimental tour de force, accomplished 18 years before the electron was discovered. Since the magnitude of the Hall voltage depends on the charge density, the voltage is grater in a semi-conductor than in a pure metal conductor.
Upsurge of the electrical field in the y-direction is called Hall Effect. A Hall potential difference U H is associated with the electric field across the sample of width w as follows:
The Hall Effect. Note: Please read the Radiation Safety Regulations at the back of this book. Objectives of the Experiment. The behaviour of the Hall voltage in a sample of doped germanium is studied in three different set-ups as follows: 1. 2. Constant magnetic field and temperature and varying control current.
Learn how to measure the Hall constant and the electric conductivity of chromium and silver samples using a four-wire connection method. The web page explains the Hall effect, the Lorentz force, the Hall voltage, and the Hall coefficient with equations and diagrams.
Hall Effect. - In 1879, Edwin H. Hall* conducted an experiment that permitted direct measurement ofthe sign and the nùmber density (number per unit volume) of charge carriers in a conductor. The Hall effect plays a critical role in our un- derstanding of conduction in metals and semi- conductors.
Introduction. In 1879, E. H. Hall observed that when a current-carrying conductor is placed in a transverse magnetic field, the Lorentz force on the moving charges produces a potential diference perpendicular to both the magnetic field and the electric current.
