which device involves the use of plasma in technology?\no arc welder\no diesel engine\no a car radio\no…

Answer:

A. arc welder

Brief Explanations:

Plasma is a high - energy state of matter. Arc welders create an electric arc between an electrode and the workpiece, which ionizes the gas around it to form plasma for welding. Diesel engines use combustion of diesel fuel, car radios work on electromagnetic principles, and battery - operated flashlights use chemical energy in batteries to produce light, none of which involve plasma.