Talk:Phi

This article has not yet been rated on Wikipedia's content assessment scale.
It is of interest to the following WikiProjects:

Please add the quality rating to the {{WikiProject banner shell}} template instead of this project banner. See WP:PIQA for details.

Writing systems Mid‑importance

	Writing portal This article falls within the scope of WikiProject Writing systems, a WikiProject interested in improving the encyclopaedic coverage and content of articles relating to writing systems on Wikipedia. If you would like to help out, you are welcome to drop by the project page and/or leave a query at the project’s talk page.Writing systemsWikipedia:WikiProject Writing systemsTemplate:WikiProject Writing systemsWriting system
Mid	This article has been rated as Mid-importance on the project's importance scale.

Please add the quality rating to the {{WikiProject banner shell}} template instead of this project banner. See WP:PIQA for details.

Greece Low‑importance

	Greece portal This article is within the scope of WikiProject Greece, a collaborative effort to improve the coverage of Greece on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.GreeceWikipedia:WikiProject GreeceTemplate:WikiProject GreeceGreek
Low	This article has been rated as Low-importance on the project's importance scale.

Archives

Archive 1

This page has archives. Sections older than 60 days may be automatically archived by when more than 3 sections are present.

Grain Size

Phi is a symbol used when describing grain size in sedimentology. Wentworth and Krumbian scales both use φ to describe the size of individual sediment particles.

This should be added to the list of scientific measurements that utilize phi.

See more here: https://en.wikipedia.org/wiki/Grain_size

Semi-protected edit request on 27 February 2019

This edit request has been answered. Set the |answered= or |ans= parameter to no to reactivate your request.

Upper Case Phi is also used in electrical power engineering a short hand for phase (as in Single Phase = 1Φ, Three Phase = 3Φ, Six Phase = 6Φ) 203.26.73.3 (talk) 05:08, 27 February 2019 (UTC)[reply]

Already in the article - "The number of phases in a power system in electrical engineering, for example 1Φ for single phase, 3Φ for three phase." ‑‑ElHef (Meep?) 15:42, 27 February 2019 (UTC)[reply]

This is not at all true. Φ is reserved in electrical engineering for magnetic flux. 1Φ is one webber of flux although Wb is more commonly used as an SI unit to avoid confusion with Ø. I can find no documentation in IEEE, NSPE, NCEES that uses Φ for phase. It would be incredibly confusing to use the same symbol. Electrical Engineering uses the symbol Ø. "My high side calculations found 3Φ on AΦ, 2Φ on BΦ, and 3Φ on CΦ in the 3Φ transformer." It should say "My high side caculations found 3Φ on AØ, 2Φ on BØ, and 3Φ on CØ in the 3Ø transformer." That is a lot less confusing because the same symbol doesn't mean two different things in the same sentence.

In mathematics phase can be denoted by Φ,θ,or Ø. Because Φ is flux and θ is phase angle, Ø is used to denote phase. This is the same reason math uses i for imaginary numbers and electrical engineers use j. i is current in electrical engineering. Yet when you type in 'symbol for electrical phase' this page pops up first. This incorrect and uncited claim needs to be fixed ASAP. 74.124.124.66 (talk) 19:57, 20 May 2020 (UTC)[reply]

alternate symbol

the first line "lowercase φ or ϕ" shows two identical symbols on my computer and it's not clear how they are distinguished. i'm not sure how you could guarantee that both different symbols are shown.