Lorentz force

A charge at rest does not feel the magnetic field: magnetism only “sees” moving charges. The force is the famous Lorentz force $\vec{F} = q\,\vec{v}\times\vec{B}$. This section gives its law and the right-hand rule, then explores the consequences when $\vec{v}\perp\vec{B}$: circular motion, the velocity selector, the mass spectrometer and the cyclotron.

• The Lorentz force
• Right-hand rule
• Uniform circular motion in the magnetic field
• The velocity selector
• The mass spectrometer
• The cyclotron

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