Electromagnetism · Explainer
Why magnetic force does no work—even in a moving rod
A moving conductor can power a circuit without the magnetic force doing work on its charges. The key is to include both the rod’s motion and the charge’s drift.
Branches of physics
Electromagnetism
Electric and magnetic fields, radiation, and electromagnetic technology.
Electromagnetism · Explainer
How can a field carry energy?
A field is more than a set of arrows. Changing electric and magnetic fields can transport energy through space.