Axial magnetic field of short bar magnet (dipole) (B_axial = (μ₀/4π)(2m/r³) on axis, m = pole strength × 2l)
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B_axial = (μ₀/4π)(2m/r³) on axis, m = pole strength × 2l
What each symbol means
| Symbol | What it stands for |
|---|---|
| m | Magnetic dipole moment (A·m²) |
| r | Distance along axis from center (m) |
When to use this
Short dipole / far field on axis; point dipole limit.