Physics » Magnetism » More Applications of Magnetism

# Summarizing More Applications of Magnetism

## Summary

• Crossed (perpendicular) electric and magnetic fields act as a velocity filter, giving equal and opposite forces on any charge with velocity perpendicular to the fields and of magnitude

$$v=\cfrac{E}{B}\text{.}$$

## Glossary

### magnetic resonance imaging (MRI)

a medical imaging technique that uses magnetic fields create detailed images of internal tissues and organs

### nuclear magnetic resonance (NMR)

a phenomenon in which an externally applied magnetic field interacts with the nuclei of certain atoms

### magnetocardiogram (MCG)

a recording of the heart’s magnetic field as it beats

### magnetoencephalogram (MEG)

a measurement of the brain’s magnetic field