If resistance decreases and voltage remains the same, what happens to current?

If resistance decreases and voltage remains the same, what happens to current?

• A. Current decreases
• B. Current increases
• C. Voltage stays the same
• D. Power stays the same

Answer: (B)

With a fixed voltage, current follows I = V / R. If resistance decreases, the denominator gets smaller, so the current increases. You can picture the same pushing force from the voltage source encountering fewer obstacles, allowing more charge to pass each second. This also means the power drawn from the source grows, since P = V I and V is constant while I rises. The idea that current would drop, or that voltage would change, doesn’t align with the given condition, and saying power stays the same would require current to stay the same, which isn’t the case here.

With a fixed voltage, current follows I = V / R. If resistance decreases, the denominator gets smaller, so the current increases. You can picture the same pushing force from the voltage source encountering fewer obstacles, allowing more charge to pass each second. This also means the power drawn from the source grows, since P = V I and V is constant while I rises. The idea that current would drop, or that voltage would change, doesn’t align with the given condition, and saying power stays the same would require current to stay the same, which isn’t the case here.