Timeline for Understanding the PN-Junction Built in Voltage
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 17, 2018 at 9:07 | comment | added | wbeaty | @XavierHubbardAnderson noticed comment. Metal thermocouples don't use Contact Potential, since its value remains constant with temperature. Instead, a Seebeck potential appears in each metal wire having a temperature gradient. Different metals have different Seebeck voltage, so connecting them gives a measurable output. But this only applies to metals. If we make thermocouples out of semiconductor, then the Contact Potential changes hugely with temperature. In other words, Peltier cooling modules are not based on Seebeck potentials, they're actually based on Volta/Galvani potentials. | |
| Oct 11, 2017 at 20:49 | comment | added | Xavier Hubbard Anderson | So then how do thermocouples work given this? | |
| Oct 10, 2017 at 19:42 | history | edited | wbeaty | CC BY-SA 3.0 |
grammar
|
| Aug 25, 2017 at 5:42 | history | edited | wbeaty | CC BY-SA 3.0 |
added 15 characters in body
|
| Aug 25, 2017 at 5:31 | history | edited | wbeaty | CC BY-SA 3.0 |
add link
|
| Aug 25, 2017 at 5:26 | history | edited | wbeaty | CC BY-SA 3.0 |
add link
|
| Aug 25, 2017 at 5:12 | history | answered | wbeaty | CC BY-SA 3.0 |