Recent content by questionmark

hi, i'm puzzled. if an observer stands next to a length of wire with a dc current in it, he will detect a circular magnetic field around the wire due to the movement of the electrons, but no electric field due to the cancellation of the electrons' and protons' electric fields. what...

inductance of seawater an interesting case may be when you have an electric circuit comprising of two widely-separted electrodes placed into seawater passing an electric current between them driven by a source. the ions in the seawater are the charge carries for the seawater-part of the...