U+3381 Square Na
U+3381 was added in Unicode version 1.1 in 1993. It belongs to the block CJK Compatibility in the Basic Multilingual Plane.
This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is a square composition of the glyphs Latin Small Letter N, Latin Capital Letter A. Its East Asian Width is wide. In bidirectional text it is written from left to right. When changing direction it is not mirrored. U+3381 offers a line break opportunity at its position, except in some numeric contexts.
The Wikipedia has the following information about this codepoint:
The ampere ( AM-pair, US: AM-peer; symbol: A), often shortened to amp, is the unit of electric current in the International System of Units (SI). One ampere is equal to 1 coulomb (C) moving past a point per second. It is named after French mathematician and physicist André-Marie Ampère (1775–1836), considered the father of electromagnetism along with Danish physicist Hans Christian Ørsted.
As of the 2019 revision of the SI, the ampere is defined by fixing the elementary charge e to be exactly 1.602176634×10−19 C, which means an ampere is an electric current equivalent to 1019 elementary charges moving every 1.602176634 seconds or 6.241509074×1018 elementary charges moving in a second. Prior to the redefinition the ampere was defined as the current passing through two parallel wires 1 metre apart that produces a magnetic force of 2×10−7 newtons per metre.
The earlier CGS system has two units of current, one structured similarly to the SI's and the other using Coulomb's law as a fundamental relationship, with the CGS unit of charge defined by measuring the force between two charged metal plates. The CGS unit of current is then defined as one unit of charge per second.
Representations
| System | Representation |
|---|---|
| Nº | 13185 |
| UTF-8 | E3 8E 81 |
| UTF-16 | 33 81 |
| UTF-32 | 00 00 33 81 |
| URL-Quoted | %E3%8E%81 |
| HTML hex reference | ㎁ |
| Wrong windows-1252 Mojibake | ㎠|
| Encoding: CP949 (hex bytes) | A7 CA |
| Encoding: EUC_KR (hex bytes) | A7 CA |
| Encoding: GB18030 (hex bytes) | 81 39 E3 33 |
| Encoding: ISO2022_JP_2 (hex bytes) | 1B 24 28 43 27 4A 1B 28 42 |
| Encoding: ISO2022_KR (hex bytes) | 1B 24 29 43 0E 27 4A 0F |
| Encoding: JOHAB (hex bytes) | DC 5A |
| Adobe Glyph List | nasquare |
Elsewhere
Complete Record
| Property | Value |
|---|---|
| 1.1 (1993) | |
| SQUARE NA | |
| SQUARED NA | |
| CJK Compatibility | |
| Other Symbol | |
| Common | |
| Left To Right | |
| Not Reordered | |
| square | |
| Latin Small Letter N Latin Capital Letter A | |
| ✘ | |
| Square Na | |
| Square Na | |
| ✘ | |
| Square Na | |
| Square Na | |
| Square Na | |
| Square Na | |
| Square Na | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✔ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Latin Small Letter N Latin Small Letter A | |
| Any | |
| ✔ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| 0 | |
| 0 | |
| 0 | |
| ✘ | |
| None | |
| — | |
| NA | |
| Other | |
| — | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Yes | |
| Yes | |
| Latin Small Letter N Latin Small Letter A | |
| No | |
| Latin Small Letter N Latin Small Letter A | |
| No | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Other | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| Other | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✘ | |
| ✔ | |
| ✔ | |
| Square Na | |
| None | |
| wide | |
| Not Applicable | |
| — | |
| No_Joining_Group | |
| Non Joining | |
| Ideographic | |
| none | |
| not a number | |
| Square Na | |
| U |