Question

1. describe the current in alternating current (ac):

the electrons dont move
the electrons move back and forth
the protons move back and forth
the protons move in one direction only
the electrons move in one direction only

Explanation:

In alternating current (AC), electric current is due to the movement of electrons (protons in the nucleus don't move in conductors). AC has electrons that change direction periodically, moving back and forth. The option "the electrons move back and forth" matches this description. Other options are incorrect: electrons do move in AC, protons don't move in conduction, and electrons moving in one direction is direct current (DC).

Answer:

B. the electrons move back and forth (assuming the second option is labeled B; if the original had a different label, adjust accordingly, but based on the selection, the correct option is the one stating "the electrons move back and forth")