Which quantity is described as the measure of opposition to current flow?

Which quantity is described as the measure of opposition to current flow?

• A. Current
• B. Voltage
• C. Resistance
• D. Power

Answer: (C)

Resistance is the measure of opposition to current flow. In electrical circuits, voltage provides the pushing force that drives current, while current is the actual flow of charges. The extent to which that flow is hindered depends on the material and geometry, quantified as resistance. Ohm’s law ties these together: I = V/R, so for a given voltage, increasing resistance lowers the current. The resistance unit is the ohm (Ω). Voltage is the driving potential, current is the flow, and power (P = VI) describes how quickly energy is transferred, not how much the flow is opposed.

Resistance is the measure of opposition to current flow. In electrical circuits, voltage provides the pushing force that drives current, while current is the actual flow of charges. The extent to which that flow is hindered depends on the material and geometry, quantified as resistance. Ohm’s law ties these together: I = V/R, so for a given voltage, increasing resistance lowers the current. The resistance unit is the ohm (Ω). Voltage is the driving potential, current is the flow, and power (P = VI) describes how quickly energy is transferred, not how much the flow is opposed.