Bar magnet and field lines2 formulas
Bar magnet
2× asked, last 2025 = pole strength, = magnetic length; from S to N. No monopoles: field lines close.
Bending a magnet
1× asked, last 2024Pole strength unchanged; uses the straight S–N distance. Arc of angle : .
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13 more formulas in 4 topics
Field of a magnetic dipole, Magnet in a uniform field, Magnetisation and intensity and Magnetic materials and hysteresis. Read the first part free. Sign in free with Google to read the rest and download the PDF.
Field of a magnetic dipole2 formulas
- Short magnet: axial and equatorial3×
- Magnetic potential of a dipole1×
Magnet in a uniform field4 formulas
- Torque and potential energy6×
- Work to rotate a magnet7×
- Small oscillations5×
- Earth's field components
Magnetisation and intensity2 formulas
- Magnetisation and intensity7×
- Susceptibility and permeability11×
Magnetic materials and hysteresis5 formulas
- Dia, para and ferromagnetism7×
- Superconductor
- Curie's law6×
- Hysteresis: demagnetising current6×
- Choosing materials
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