A material has magnetic susceptibility χm = -2.0 × 10⁻⁵. Set its relative permeability on the scale, which runs from 0.9999 to 1.0001 in steps of 0.00001.

Physics II / Magnetic Materials

Practice question · Estimate

A material has magnetic susceptibility $\chi_m = -2.0 \times 10^{-5}$ . Set its relative permeability on the scale, which runs from 0.9999 to 1.0001 in steps of 0.00001.

Estimate on a scale from Diamagnetic (below 1) (0.9999) to Paramagnetic (above 1) (1.0001).

Hints

Relative permeability is one plus the magnetic susceptibility.
The susceptibility here is NEGATIVE, so the result falls just below 1.

Show the answer

0.99998 (answers within ±0.000015 count)

Why

$\mu_r = 1 + \chi_m = 1 - 2.0\times10^{-5} = 0.99998$ , just below 1, which is the diamagnetic signature and has no dielectric counterpart. This is the one place the electric and magnetic parallels genuinely diverge.

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A material has magnetic susceptibility χm=−2.0×10−5\chi_m = -2.0 \times 10^{-5}χm​=−2.0×10−5. Set its relative permeability on the scale, which runs from 0.9999 to 1.0001 in steps of 0.00001.

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More questions on Magnetic Materials

A material has magnetic susceptibility $\chi_m = -2.0 \times 10^{-5}$ . Set its relative permeability on the scale, which runs from 0.9999 to 1.0001 in steps of 0.00001.