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Magnetic Constant
(redirected from Permeability constant)

    Also found in: Dictionary/thesaurus, Acronyms, Wikipedia 0.01 sec.
magnetic constant [mag′ned·ik ′kän·stənt]
(electromagnetism)
The absolute permeability of empty space, equal to 1 electromagnetic unit in the centimeter-gram-second system, and to 4π × 10-7henry per meter or, numerically, to 1.25664 × 10-6henry per meter in the International System of units. Symbolized μ0.
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.
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o] = original pressure A = surface area of tire innerliner V = contained air volume Q = effective permeability constant of the tire construction T = effective average thickness of the tire components If the objective is to obtain tires with different permeabilities of the innerliner compounds and the same rate of pressure loss (k), then K must be constant.
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