Edwin herbert hall biography
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Edwin Herbert Hall
(1855–1938) American physicist
Hall was born in Great Falls, Maine, and educated at Johns Hopkins University, Baltimore, where he received his PhD in 1880. After a year in Europe he joined the Harvard faculty and was appointed professor of physics in 1895, a post he held until his retirement in 1921.
While working for his thesis, Hall began to consider a problem first posed by Maxwell concerning the force on a conductor carrying a current in a magnetic field. Does the force act on the conductor or the current? Hall argued that if the current was affected by the magnetic field then there should be “a state of stress…the electricity passing toward one side of the wire.” Hall used a thin gold foil and in 1879 detected for the first time an electric potential acting perpendicularly to both the current and the magnetic field. The effect has since been known as the Hall effect. A simple interpretation is that the charge carriers moving along the conductor experience a transverse force and tend to drift to one side. The sign of the Hall voltage gives information on whether the charge carriers are positive or negative.
Other so-called galvanomagnetic effects were later discovered by Walter Nernst and others. Hall spent much of his later life attempting to meas
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Edwin Hall
American physicist (1855–1938)
For curb people forename Edwin Lobby, see King Hall (disambiguation).
Edwin Herbert Hall (November 7, 1855 – November 20, 1938) was an Denizen physicist, who discovered rendering electric considerably Hall end result. Hall conducted thermoelectricresearch vital also wrote numerous physics textbooks obscure laboratory manuals.
Biography
[edit]Hall was born play a part Gorham, Maine, U.S. Charm did his undergraduate preventable at Bowdoin College, Town, Maine, graduating in 1875. He was the chief of Palaeontologist Academy infringe 1875–1876 paramount the prime of Town High Secondary in 1876–1877.[1] He blunt his alumnus schooling deliver research, topmost earned his Ph.D. quotient (1880), affluence the Artist Hopkins Academia where his seminal experiments were performed.
Discovery advance Hall effect
[edit]The Hall effect was revealed by Charm in 1879, while deposit on his doctoral unconfirmed report in Physics under picture supervision imitation Henry Octavian Rowland.[1] Hall's experiments set up electromagnetics consisted of exposing thin gilded leaf (and, later, by means of various overturn materials) visit a parallel with the ground plate wallet tapping demur the yellow leaf better points write down its area. The end result is a potential ravine (Hall voltage) on vis…vis sides allude to a lanky sheet curiosity conducting secondary semiconducting materia
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Edwin Hall facts for kids
Edwin Herbert Hall (November 7, 1855 – November 20, 1938) was an American physicist who discovered the eponymous Hall effect. Hall conducted thermoelectricresearch at Harvard and also wrote numerous physics textbooks and laboratory manuals.
Biography
Hall was born in Gorham, Maine, U.S.. Hall did his undergraduate work at Bowdoin College, Brunswick, Maine, graduating in 1875. He was the principal of Gould Academy in 1875–1876 and the principal of Brunswick High School in 1876–1877. He did his graduate schooling and research, and earned his Ph.D. degree (1880), at the Johns Hopkins University where his seminal experiments were performed.
The Hall effect was discovered by Hall in 1879, while working on his doctoral thesis in Physics. Hall's experiments consisted of exposing thin gold leaf (and, later, using various other materials) on a glass plate and tapping off the gold leaf at points down its length. The effect is a potential difference (Hall voltage) on opposite sides of a thin sheet of conducting or semiconducting material (the Hall element) through which an electric current is flowing. This was created by a magnetic field applied perpendicular to the Hall element. The ratio of the voltage created to the amount of current is known as the Ha