In a circuit, what does a high resistance indicate about the flow of current?

A high resistance in a circuit implies that the flow of current will be low. This relationship is grounded in Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). Therefore, when the resistance increases, the current decreases provided the voltage remains constant.

In practical terms, high resistance acts as a barrier to the flow of electrons, thus limiting the amount of current that can pass through the circuit. This is why circuits designed for minimal current flow—such as in electronic components that require low power—often utilize high resistance.

Understanding this concept is fundamental in various applications of electrical engineering and cathodic protection systems, where controlling current flow is essential for safe operation and effectiveness.