The magnet data cannot determine air permeability; only the magnet's dipole moment can be estimated¶

Claim · All claims
Evidence · 1 study · design r2 · q2
Currency · newest study 2014 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Applying the permeability analysis to the magnet fails; assuming µair, one can only estimate the magnet's magnetic dipole m. → V.O.M. Lara 2014

Evidence¶

V.O.M. Lara 2014¶

V.O.M. Lara, D. F. Amaral, D. Faria, and L. P. Vieira. (2014). Demonstrations of magnetic phenomena: Measuring the air permeablity using tablets. https://arxiv.org/abs/1405.6581 doi:10.48550/arxiv.1405.6581

q2 · i? · design · r2

Analysis of the magnet variant of the demonstration-set experiment; the authors state that "all that one is able to make is an estimate for the magnet magnetic dipole m, assuming the value for µair".

"Unfortunately, in this experiment analysis it was not possible to determine the value ofµair using the magnet."

Discussion¶

Related Claims¶

• The demonstration set yields a fair estimate of air permeability µair from coil data — reports the opposite
• Magnetic field falls off as the inverse cube of axial distance for both a coil and a magnet — related
• Magnetic field measured by a tablet magnetometer depends linearly on the coil current — related