What term describes electrically charged particles flowing in one direction only?

What term describes electrically charged particles flowing in one direction only?

• A. AC
• B. DC
• C. Galvonometer
• D. Transformer

Answer: (B)

Direct current describes electrically charged particles flowing in a single direction. This happens when a fixed-polarity source, like a battery or DC power supply, pushes charges steadily in one way. The actual electrons move a bit, but the current direction remains constant. In contrast, alternating current reverses direction periodically, so there isn’t a single prevailing direction over time. A galvanometer is a device that measures current, and a transformer uses a changing magnetic field from AC to transfer energy and change voltage, so they’re tied to alternating flow rather than one-way flow.

Direct current describes electrically charged particles flowing in a single direction. This happens when a fixed-polarity source, like a battery or DC power supply, pushes charges steadily in one way. The actual electrons move a bit, but the current direction remains constant. In contrast, alternating current reverses direction periodically, so there isn’t a single prevailing direction over time. A galvanometer is a device that measures current, and a transformer uses a changing magnetic field from AC to transfer energy and change voltage, so they’re tied to alternating flow rather than one-way flow.