What statement best describes Ohm's Law?

What statement best describes Ohm's Law?

• A. Current through a conductor between two points is directly proportional to the voltage across the points.
• B. Voltage is proportional to resistance regardless of current.
• C. Power equals current times resistance.
• D. Capacitance determines current flow.

Answer: (A)

The key idea is that current is driven by the voltage across a path and the amount of current that flows depends on the resistance in that path. Ohm’s Law ties these together with I = V / R, so for a fixed resistance, doubling the voltage doubles the current. That direct proportionality of current to voltage (when resistance is constant) is the best way to describe the relationship. The other statements don’t fit because voltage is not determined solely by resistance; it depends on the current as well (V = IR). Power in a circuit is not simply current times resistance; it’s VI or I²R. Capacitance affects how current changes in circuits with capacitors, especially during charging or discharging, and isn’t described by the basic I = V / R relation for a resistor.

The key idea is that current is driven by the voltage across a path and the amount of current that flows depends on the resistance in that path. Ohm’s Law ties these together with I = V / R, so for a fixed resistance, doubling the voltage doubles the current. That direct proportionality of current to voltage (when resistance is constant) is the best way to describe the relationship.

The other statements don’t fit because voltage is not determined solely by resistance; it depends on the current as well (V = IR). Power in a circuit is not simply current times resistance; it’s VI or I²R. Capacitance affects how current changes in circuits with capacitors, especially during charging or discharging, and isn’t described by the basic I = V / R relation for a resistor.