Which statement about current is true?

Which statement about current is true?

• A. Current decreases when voltage increases.
• B. Current flow will increase when voltage increases.
• C. Current is independent of voltage.
• D. Current is inversely proportional to resistance only in DC circuits.

Answer: (B)

Current follows I = V / R, so with resistance fixed, increasing voltage pushes more charge through per second and the current rises in direct proportion to the voltage. For example, with a constant 10-ohm load, doubling the voltage from 5 V to 10 V doubles the current from 0.5 A to 1 A. The other statements clash with this relationship: current does not decrease when voltage increases, it is not independent of voltage, and saying current is inversely proportional to resistance only in DC circuits ignores that current also depends on impedance in AC circuits (I = V / Z).

Current follows I = V / R, so with resistance fixed, increasing voltage pushes more charge through per second and the current rises in direct proportion to the voltage. For example, with a constant 10-ohm load, doubling the voltage from 5 V to 10 V doubles the current from 0.5 A to 1 A. The other statements clash with this relationship: current does not decrease when voltage increases, it is not independent of voltage, and saying current is inversely proportional to resistance only in DC circuits ignores that current also depends on impedance in AC circuits (I = V / Z).