Question

what is special about a dc circuit? a. charge moves in a single direction. b. charge moves back and forth very quickly. c. it has both series and parallel components. d. it has only series or only parallel components.

Explanation:

In a DC (direct current) circuit, the key characteristic is that the charge flows in one - direction only. Option B describes an AC (alternating current) circuit where charge moves back and forth. Options C and D are about the configuration of components (series and/or parallel) which is not specific to DC circuits. DC circuits can have series, parallel or combination of both components, but this is not their defining special feature.

Answer:

A. Charge moves in a single direction.