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education/physics/PHYS2220/Magnetism.md
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- Magnetic fields are represented with the symbol $\vec{B}$
- Magnetism is based in *electric charge*, specifically the motion of that charge.
- The magnetic force is always at right angles to both the velocity $\vec{v}$, and the magnetic field $\vec{B}$
- The force is greatest when the charge is moving at right angles and is zero for motion parallel to the field. THe force is generally proportional to $\sin(\theta)$, where $\theta$ is the angle between the velocity $\vec{v}$, and the field $\vec{B}$.
- The force is greatest when the charge is moving at right angles and is zero for motion parallel to the field. The force is generally proportional to $\sin(\theta)$, where $\theta$ is the angle between the velocity $\vec{v}$, and the field $\vec{B}$.
The formula that describes magnetic force compactly is:
$$ \vec(F_B) = q\vec(v) \times \vec{B} $$
- $F_B$ is the magnetic force