MAGNETIC FIELD
Source type
Magnetic Dipole
Current Loop
Solenoid
Long Wire
Strength
2.0
Inclination
0°
Field lines
16
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|B| intensity
0
max
MAGNETOSTATICS — BIOT-SAVART
Dipole: B = μ₀/(4π) · m/r³ · (3cosθ r̂ − ẑ)
Loop: dB = μ₀I/(4π) · dl×r̂/r²
Solenoid: B = μ₀nI inside, ≈0 outside
Field lines = integral curves of B(r)