Skip to comments.
Certain doped-oxide ceramics resist Ohm's Law
American Institute of Physics ^
| September 21, 2010
| Unknown
Posted on 09/21/2010 8:50:31 AM PDT by decimon
click here to read article
Navigation: use the links below to view more comments.
first 1-20, 21-32 next last
E I, E I O.
1
posted on
09/21/2010 8:50:32 AM PDT
by
decimon
To: decimon
Temperature dependent....Opps.
2
posted on
09/21/2010 8:52:55 AM PDT
by
devane617
(November!)
To: decimon
caused a gradual change in the materials’ electrical resistance.
So Delta V = I * Delta R.
How is Ohm’s law repealed?
3
posted on
09/21/2010 8:53:48 AM PDT
by
DManA
To: DManA
self changing potentiometer? Wouldn’t violate Ohm’s law.
4
posted on
09/21/2010 8:57:22 AM PDT
by
Secret Agent Man
(I'd like to tell you, but then I'd have to kill you.)
To: decimon
Ω
5
posted on
09/21/2010 8:57:39 AM PDT
by
ßuddaßudd
(7 days - 7 ways Guero >>> with a floating, shifting, ever changing persona.....)
To: decimon
Resist Ohm's law? You made a funny.
6
posted on
09/21/2010 8:57:54 AM PDT
by
Hoodat
(.For the weapons of our warfare are mighty in God for pulling down strongholds.)
To: decimon
Oxides are on dope now? No wonder they are breaking the law!
7
posted on
09/21/2010 8:58:12 AM PDT
by
Boogieman
To: DManA
Sounds like a non-linear device in which the “resistance” they are using in their calculation varies with time and temperature.
A more meaningful discovery would be to violate Kirchhoff’s law
8
posted on
09/21/2010 8:59:08 AM PDT
by
farmguy
To: farmguy
Sounds somewhat like a posistor/thermistor.
9
posted on
09/21/2010 9:00:50 AM PDT
by
Farmer Dean
(stop worrying about what they want to do to you,start thinking about what you want to do to them)
To: decimon
Ohmmm
To: Secret Agent Man; DManA
Yeah, I didn’t see any violation,
just a change in resistance as voltage was applied,
resulting in an Ohm’s law correspondent change in current...
11
posted on
09/21/2010 9:06:09 AM PDT
by
MrB
(The difference between a (de)humanist and a Satanist is that the latter knows who he's working for.)
To: decimon
This is much ado about nothing. Sure, maybe we have a new form of semiconuctor, but I don’t see where Ohm’s Law is violated.
As someone said previously, if Kirchoff’s voltage law and current law somehow don’t work anymore. then we have something here to get excited about.
12
posted on
09/21/2010 9:09:49 AM PDT
by
saluki_in_ohio
(I support statehood for Central and Southern Illinois. Let Cook County play with itself...)
To: MrB
Doesn’t a diode do the same thing?
13
posted on
09/21/2010 9:09:56 AM PDT
by
DManA
To: DManA
i.e. change resistance depending upon the voltage applied.
14
posted on
09/21/2010 9:12:03 AM PDT
by
DManA
To: DManA
A zener diode does, after the reverse “breakdown” voltage is hit.
A regular diode just allows current in one direction.
15
posted on
09/21/2010 9:14:59 AM PDT
by
MrB
(The difference between a (de)humanist and a Satanist is that the latter knows who he's working for.)
To: Farmer Dean
16
posted on
09/21/2010 9:16:26 AM PDT
by
loungitude
( The truth hurts.)
To: ßuddaßudd
1 Ω
----------------------
(resistance = useless)
Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)
17
posted on
09/21/2010 9:18:29 AM PDT
by
LonePalm
(Commander and Chef)
To: devane617
BUT..... does the resistance go DOWN, or UP, when the temperature goes UP ???
It it goes down, I see why they are excited.
18
posted on
09/21/2010 9:19:28 AM PDT
by
UCANSEE2
(lame and ill-informed post)
To: MrB
Regular diode
Resistance about 0 when voltage at one polarity.
Resistance about infinite when voltage at the opposite polarity.
But yea a zener is a better comparison.
19
posted on
09/21/2010 9:21:14 AM PDT
by
DManA
To: decimon
Big deal. Doped semiconductors do not follow Ohm's law. This has been the foundation of electronics for over 60 years. It was known as far back as 1889, when Dr. Bose did his famous microwave experiments.
Barium titanates are already used commercially for microphones. This article needs to get to the point.
20
posted on
09/21/2010 9:27:21 AM PDT
by
backwoods-engineer
(There is no "common good" which minimizes or sacrifices the individual. --Walter Scott Hudson)
Navigation: use the links below to view more comments.
first 1-20, 21-32 next last
Disclaimer:
Opinions posted on Free Republic are those of the individual
posters and do not necessarily represent the opinion of Free Republic or its
management. All materials posted herein are protected by copyright law and the
exemption for fair use of copyrighted works.
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson