Define Direct Current.

Define Direct Current.

• A. The flow of electrical current in alternating directions
• B. The flow of electrical current through a circuit in one direction only
• C. The rate of change of voltage over time
• D. The instantaneous power in a circuit

Answer: (B)

Direct Current means the electric charges move in a single, fixed direction through a circuit. This unidirectional flow is what sets DC apart from Alternating Current, where the direction of flow reverses periodically. A DC source, like a battery, pushes current steadily from one terminal to the other, so the current maintains the same direction over time (even if its magnitude varies). In contrast, option describing the rate of change of voltage or the instantaneous power would not define the nature of the current’s direction, and the description of alternating directions matches AC, not DC.

Direct Current means the electric charges move in a single, fixed direction through a circuit. This unidirectional flow is what sets DC apart from Alternating Current, where the direction of flow reverses periodically. A DC source, like a battery, pushes current steadily from one terminal to the other, so the current maintains the same direction over time (even if its magnitude varies). In contrast, option describing the rate of change of voltage or the instantaneous power would not define the nature of the current’s direction, and the description of alternating directions matches AC, not DC.