What is the opposite of current?

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

Answer: (A)

The main concept being tested is how current relates to resistance through Ohm’s Law. Current is the flow of electrical charge, and resistance acts to limit that flow. With a fixed voltage, increasing resistance reduces the current, since I = V/R. This inverse relationship makes resistance the factor that opposes or counteracts the flow of current. For example, at a given voltage, doubling the resistance halves the current. The other terms don’t fit this idea: current is the amount of flow itself, voltage is what drives the flow, and grounding is a safety path, not something that directly opposes current.