weber

The unit of magnetic flux in SI. Symbol, Wb (no period).

One weber is “the magnetic flux which, linking a circuit of one turn, would produce in it an electromotive force of 1 volt if it were reduced to zero at a uniform rate in 1 second.” (Resolution 2, CIPM, 1946, ratified by the CGPM in 1948.) The weber is volt seconds or, in terms of base units only,

$A fraction: meters squared times kilograms over seconds squared times amperes$

The weber was introduced as a practical electromagnetic unit = 10⁸ maxwells at the International Electrotechnical Commission in Paris in 1933, but it was not much used until the meter-kilogram-second system was generally adopted.

The weber is named for W. E. Weber (1804-1891).

Examples

Through many an ohm the weber flew,
And clicked the answer back to me,—
I am thy farad, staunch and true
Charged to a volt with love for thee.

James Clerk Maxwell.
“Valentine from a male telegraphist to a female telegraphist.”

Yes, the James Clerk Maxwell. At the time this was written, the weber was the name of a unit of electric current. This is only the last verse of the poem. It is reproduced from Alexander MacFarlane, Lectures on Ten British Physicists of the Nineteenth Century.

WEBER. The name originally given to the unit of electric quantity or coulomb.
[Footnote] Weber or Veber also became commonly used to define the unit of electrical current—a contraction of “webers per second”— but was replaced by “ampere” at the Paris Congress of 1884. It was once proposed to designate the unit magnetic pole.

Latimer Clark.
A Dictionary of Metric and Other Useful Measures.
London: E & F.N. Spon, 1891.