In a circuit, what effect does increasing the resistance have on the current?

Increasing the resistance in an electrical circuit directly affects the current, leading to a decrease in its flow. This relationship is fundamentally described by Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). When resistance is increased while the voltage remains constant, the current must decrease to maintain that relationship.

If you think about it, when you add more resistance, it becomes harder for the electric current to flow through the circuit. This is similar to narrowing a water pipe; as you tighten or constrict the pipe, less water can flow through, reflecting how increased resistance restricts the flow of current. Thus, the correct answer confirms the expected behavior of current in relation to resistance in a circuit.