Ohm's Law states that the current through a conductor between two points is directly proportional to what?

Ohm's Law states that the current through a conductor between two points is directly proportional to what?

• A. Voltage is proportional to current
• B. Resistance is proportional to current
• C. Current is proportional to voltage
• D. Power is proportional to current

Answer: (C)

Current through a conductor is driven by the voltage across it, and Ohm's law expresses this as I = V / R. This means that, with resistance held constant, current is directly proportional to voltage: doubling the voltage doubles the current. This relationship is the reason why the current responds directly to the potential difference applied. The other ideas don’t fit as neatly: current is not directly proportional to resistance (it’s inversely proportional for a fixed voltage), and power depends on both current and voltage (P = VI = I^2R), not current alone.

Current through a conductor is driven by the voltage across it, and Ohm's law expresses this as I = V / R. This means that, with resistance held constant, current is directly proportional to voltage: doubling the voltage doubles the current. This relationship is the reason why the current responds directly to the potential difference applied. The other ideas don’t fit as neatly: current is not directly proportional to resistance (it’s inversely proportional for a fixed voltage), and power depends on both current and voltage (P = VI = I^2R), not current alone.