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Lorentz force F = qv × B and the resulting circular trajectory.
Force on a current segment and torque on a current loop.
Magnetic field from a current element; field at the centre of a loop.
Line integral of B equals μ₀ times enclosed current; symmetric cases.
Force per unit length between two parallel wires; defines the ampere.
Φ = B·A·cosθ as the central quantity of induction.
Rate of change of flux equals induced EMF.
Induced current opposes the change — a statement of energy conservation.
EMF generated by a rod moving through a magnetic field.