What are the four ways to know if the motion of an object at rest is influenced?

The answer is b.the gaseous state is electrically positive, while the plasma state is electrically negative. 

Gotta have a picture ^^

Current supplied to consumers from generating plants like coal power plant, nuclear power plant, geothermal and others are in form of alternating current instead of direct current because it can be transported easily in a long distance. also, the alternating current has a wide range of frequency and the amount or energy can be increased or decreased.