5 ms·
These fields can create forces, but they can't do work unfortunately.
by torrance 6y ago
These fields can create forces, but they can't do work unfortunately.
- api 6y agoA magnetic field can't do work by interacting with another generated field? If so how do electric motors work? I must be missing something here.
- torrance 6y agoElectric fields do the work there. A charged particle in a magnetic field feels a force (Lorenz force) that act perpendicularly to its velocity. But work is only work if the force is applied in the direction of its velocity. Essentially it's changing its direction of momentum, but not its magnitude. On the other hand, some magnetic fields (not all) can be transformed into electric fields by a change of reference frame. In that case, the electric field can be used to do work. But I don't believe that's possible on these scales.
- dr_dshiv 6y agoI want to know things like this. Any recommendations for books or lectures?
- petermcneeley 6y agoViaScience has some very good lectures on physics. https://www.youtube.com/channel/UCx6G76LCKLdd7__F0xt5POQ https://www.youtube.com/channel/UCx6G76LCKLdd7__F0xt5POQ
- cli 6y agoAny undergraduate level textbook on E&M. Griffith's 'Introduction to Electrodynamics' is a commonly used one.