# A bit of physics help? Thevenin resistance equivalence

**URL:** <https://forum.kirupa.com/t/a-bit-of-physics-help-thevenin-resistance-equivalence/203935>\
**Category:** random\
**Created:** [October 15, 2006, 7:05pm UTC](https://forum.kirupa.com/t/a-bit-of-physics-help-thevenin-resistance-equivalence/203935 "2006-10-15T19:05:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![MTsoul](https://avatars.discourse-cdn.com/v4/letter/m/91b2a8/32.png) [@MTsoul](https://forum.kirupa.com/u/MTsoul)\
**Post date:** [October 15, 2006, 7:05pm UTC](https://forum.kirupa.com/t/a-bit-of-physics-help-thevenin-resistance-equivalence/203935/1 "2006-10-15T19:05:24Z")

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![](http://img211.imageshack.us/img211/8369/theveninyx1.png)

The only thing I don’t get is why the thevenin equivalence of the resistance is the parallel of 20k and 30k. Shouldn’t they be in series?

Thanks!