Charge carrier Charge carrier In physics, a charge carrier is a particle or quasiparticle that is free to move, carrying an electric charge, especially the particles that carry electric charges in electrical conductors. Examples are electrons, ions and holes. In a conducting medium, an electric field can exert force on these free particles, causing a net motion of the particles through the medium; this is what constitutes an electric current. In different conducting media, different particles serve to carry charge: It can be seen that in some conductors, such as ionic solutions and plasmas, there are both positive and negative charge carriers,
John (given name) masculine name in the United Kingdom, but by 2004 it had fallen out of the top 50 names for newborn boys in England and Wales. By contrast Jack, which was a nickname for John but is now established as a name in its own right, was the most popular name given to newborn boys in England and Wales every year from 1995 to 2005. However, "John" has not been a popular one for members of the royal family. The memory of King John is tainted by negative depictions of his turbulent reign and troublesome personality and by his role as