Oklahoma State Closed Circuit Television License Practice Test

Resistance is the property of a conductor that limits current. When a voltage is applied across a conductor, resistance dictates how much current will flow through it based on Ohm's Law, which states that the current (I) is equal to the voltage (V) divided by the resistance (R) in the circuit (I = V/R).

The greater the resistance in a conductor, the less current will flow for a given voltage. This property is a result of collisions between the charged particles (usually electrons) that carry the current and the atoms within the conductor, which impede their flow. As the resistance increases, it becomes more challenging for the current to pass through, effectively limiting it.

Other options like capacitance and inductance pertain to different properties of electrical components and do not directly control the amount of current flowing in the manner that resistance does. Voltage is the driving force for current flow but does not itself limit it; it’s the interaction with resistance that determines the final current level in the circuit.