Magnetic Constant

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magnetic constant

[mag′ned·ik ′kän·stənt]
The absolute permeability of empty space, equal to 1 electromagnetic unit in the centimeter-gram-second system, and to 4π × 10-7 henry per meter or, numerically, to 1.25664 × 10-6 henry per meter in the International System of units. Symbolized μ0.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Magnetic Constant


a proportionality constant μ0 which occurs in a number of formulas involving magnetism when they are written in rationalized form (in the International System of Units). Thus, the induction B and intensity H of a magnetic field are related in a vacuum by the formula B = μoH, where μ0 = 4π ×10-7 henry sperm (H/m) ≈ 1.26 ×10-6 H/m.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.