If resistance increases while voltage remains constant, what happens to current?

• A. Current increases
• B. Current stays the same
• C. Current decreases
• D. Current becomes negative

Answer: (C)

When voltage is constant, current is determined by I = V/R. If resistance increases, the same driving voltage pushes fewer charges per second, so the current falls. For example, with a 12 V source, moving from 6 Ω to 12 Ω reduces current from 2 A to 1 A. This shows the inverse relationship between current and resistance under a fixed voltage. The current won’t become negative unless the voltage polarity is reversed or the reference direction is flipped, and it won’t stay the same if resistance changes.