2. Biography
Hall was born in Gorham, Main U.S.A., in 1855.
He studied at the Bowdoin College, Main.
He was graduate 1875.
He was the principal of two school (Gould
Academy, Brunswick High School).
He discovered the Hall effect in 1879.
He died in Cambridge, Massachusetts, in 1938.
3. Researches
Hall made a lot of studies in the thermoeletric at Harvard.
He wrote some physics text-book and laboratory manuals.
While he studied for his doctoral thesis in physics at the Johns Hopkins
University in Baltimora, Maryland, he discovered the Hall effect before
the discover of the electrons (J.J. Thomson 1897).
Hall's experiments consisted of thin gold leaf, crossed by flow current,
on a glass plate and tapping off the gold leaf at points down its length.
4. Hall Effect
What is it?
It is the production of a voltage
difference across an eletrical
conductor, like the gold leaf,
transverse to an elettrical
current in the conductor and to
unapplied magnetic field
perpendicular to the current.
5. Hall Effect
Why is there the Hall effect?
It is cause of Lorentz force that deflected the electrons present in the
plate across it; this product the voltage differnce.
What did the Hall effect prove?
The Hall effect prove that the current is composed by moving electrons in
conductor materials; the Hall effect is avaible in a lot of physics fields like
astonomy, quantum world, chemistry
