An electric arc between two nails. An electric arc or arc discharge is an electrical breakdown of a gas that produces an ongoing plasma discharge, resulting from a current through normally nonconductive media such as air.n electric arc differs from a glow discharge in that the current density is quite high, and the voltage drop within the arc is low; at the cathode, the current density can be as high as one megaampere per square centimeter. An electric arc has a non-linear relationship between current and voltage.
According to The Bureau of Labor Statistics, the states hiring the most ultrasound techs, in relation to overall population, were as follows in 2008: 1  Florida. 2  Connecticut. 3  New Jersey. 4  Alabama. Tennessee.
More than 60 percent of ultrasound techs worked in hospitals. But as medical imaging equipment has become less expensive and more widespread, physicians have begun to employ this technology in their offices. As a result, they now account for 24 percent of locations where ultrasound techs work.ltra sound tech education. It takes two years to become an ultrasound technician. You will need an associateâs degree and then will need a certification or license depending on your state.