Direct current (DC) is defined as:

Direct current (DC) is defined as:

• A. An electric current that does not reverse its direction
• B. A current that reverses direction
• C. A current that changes direction randomly
• D. A current produced only by solar power

Answer: (A)

Direct current is a current that flows in one direction only. The charges move steadily in the same direction under a constant potential difference, so the flow does not reverse over time. This is why a battery or a DC power supply gives current that stays pointing in the same direction. By contrast, alternating current keeps changing direction as the voltage oscillates, so the current reverses periodically. It’s useful to remember that conventional current is taken as the direction positive charges would move, even though electrons actually travel the opposite way. Statements about reversing direction, changing direction randomly, or being produced only by solar power describe other cases or misunderstandings: DC is not about reversal, and while solar panels can generate DC, they are not the only source.

Direct current is a current that flows in one direction only. The charges move steadily in the same direction under a constant potential difference, so the flow does not reverse over time. This is why a battery or a DC power supply gives current that stays pointing in the same direction. By contrast, alternating current keeps changing direction as the voltage oscillates, so the current reverses periodically. It’s useful to remember that conventional current is taken as the direction positive charges would move, even though electrons actually travel the opposite way. Statements about reversing direction, changing direction randomly, or being produced only by solar power describe other cases or misunderstandings: DC is not about reversal, and while solar panels can generate DC, they are not the only source.