What is a Hall Effect? And what is a Hall Effect sensor?
2006-08-12 14:32:22 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
What is it used for?
2006-08-12 14:36:31 · update #1
it makes the sound echo
2006-08-12 14:37:28 · answer #1 · answered by orevem5 2 · 1⤊ 2⤋
The Hall effect refers to the potential difference (Hall voltage) on opposite sides of a thin sheet of conducting or semiconducting material in the form of a 'Hall bar' (or a van der Pauw element) through which an electric current is flowing, created by a magnetic field applied perpendicular to the Hall element. Edwin Hall discovered this effect in 1879...
More here: http://en.wikipedia.org/wiki/Hall_effect
A Hall effect sensor is a transducer that varies its output voltage in response to changes in magnetic field density. Hall sensors are used for proximity switching, positioning, speed detection and current sensing applications.
More here: http://en.wikipedia.org/wiki/Hall_effect_sensor
2006-08-12 14:37:04 · answer #2 · answered by Pablo Fanques 3 · 0⤊ 0⤋
Ain't you got google?
If an electric current flows through a conductor in a magnetic field, the magnetic field exerts a transverse force on the moving charge carriers which tends to push them to one side of the conductor. This is most evident in a thin flat conductor as illustrated. A buildup of charge at the sides of the conductors will balance this magnetic influence, producing a measurable voltage between the two sides of the conductor. The presence of this measurable transverse voltage is called the Hall effect after E. H. Hall who discovered it in 1879.
2006-08-12 14:35:06 · answer #3 · answered by Anonymous · 3⤊ 0⤋
IT is a magnetoelectric effect where the conductance of a material is affected by magnetism. USually used in a semiconductor like a transistor to act like a switch. Most common application these days is in wheel rotation sensors for ABS brakes.
2006-08-12 14:36:27 · answer #4 · answered by auntiegrav 6 · 0⤊ 0⤋
Mel and Pablo are right.
The effect is used in some current meters which clip around a wire carrying the current to be measured. That way it's not necessary to break the circuit and insert the meter in series, as is the case with conventional ammeters.
2006-08-12 15:06:22 · answer #5 · answered by genericman1998 5 · 0⤊ 0⤋
the alternative facet turns into actual charged as a results of *absence* of electrons. undergo in techniques that the textile replaced into unbiased initially, so now that there is a extreme concentration of electrons at one facet, there could be a decrease concentration on the different facet. as a results of fact the textile is unbiased, then there could be an more suitable concentration of constructive rates on the different facet. additionally, if the constructive rates have any mobility, the comparable tension that drives the electrons in one course willpersistent the constructive rates (e.g., protons) interior the alternative course.
2016-12-17 09:50:49 · answer #6 · answered by ? 4 · 0⤊ 0⤋
Mel rings the Bell.
2006-08-12 16:46:43 · answer #7 · answered by LeBlanc 6 · 0⤊ 0⤋
e.h. hall would know. i'm sure he's got text out there somewhere.
no doubt klaus von klitzing has a corollary or two.
2006-08-12 14:36:02 · answer #8 · answered by pyg 4 · 0⤊ 0⤋
Mel is absolutely
100% correct.
I wouldn't argue with
his answer!
2006-08-12 14:37:13 · answer #9 · answered by vim 5 · 0⤊ 0⤋