Which term describes a continuous, unidirectional current flow?

Which term describes a continuous, unidirectional current flow?

• A. Hydrometer
• B. Field (magnetic field)
• C. Inductance
• D. Direct Current

Answer: (D)

Direct current is a continuous, unidirectional flow of electric charge. It travels in one direction from the source through the circuit, and its polarity remains essentially constant, unlike alternating current which reverses direction periodically. This unidirectional, steady flow is what distinguishes DC. The other terms refer to different concepts: a hydrometer measures liquid density, a magnetic field describes the space around magnets or current-carrying conductors, and inductance is a circuit’s property that resists changes in current due to magnetic coupling.

Direct current is a continuous, unidirectional flow of electric charge. It travels in one direction from the source through the circuit, and its polarity remains essentially constant, unlike alternating current which reverses direction periodically. This unidirectional, steady flow is what distinguishes DC. The other terms refer to different concepts: a hydrometer measures liquid density, a magnetic field describes the space around magnets or current-carrying conductors, and inductance is a circuit’s property that resists changes in current due to magnetic coupling.