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.
The state with the most jobs for ultrasound technicians in 2011 was California, with over 9 percent of the positions and mean wages at $81,750 per year, or $39.30 per hour. The city with the same distinction was New York, with average pay of $64,880 annually, or $31.19 per hour.n 2011, over 59 percent of the 54,760 ultrasound technicians worked for general medical and surgical hospitals, making them the largest employer of the profession. Techs here made a mean $65,870 per year, or $31.67 per hour.