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.
Long Island is mainly the Nassau-Suffolk, NY Metropolitan area. The median ultrasound technician salary was $77,580 or $37.30 per hour in 2016 according to the Bureau of Labor Statistics. This is much higher than the median annual wage for all sonographers working in the U.S.