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

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

• A. Increase
• B. Decrease
• C. Stay the same
• D. Fluctuate

Answer: (A)

Current through a circuit with fixed resistance follows Ohm's law: I = V / R. When resistance stays the same and voltage increases, the current increases in direct proportion to the voltage. Doubling the voltage doubles the current; tripling the voltage triples the current. So the current goes up. The other options don’t fit because keeping current the same would require a change in resistance to offset the voltage, and fluctuating would imply unstable conditions—neither occurs when voltage rises while resistance remains constant.

Current through a circuit with fixed resistance follows Ohm's law: I = V / R. When resistance stays the same and voltage increases, the current increases in direct proportion to the voltage. Doubling the voltage doubles the current; tripling the voltage triples the current. So the current goes up. The other options don’t fit because keeping current the same would require a change in resistance to offset the voltage, and fluctuating would imply unstable conditions—neither occurs when voltage rises while resistance remains constant.