When the resistance in a circuit increases, what effect does this have on the current?

When resistance in a circuit increases, the effect on current can be understood through Ohm's Law, which states that current (I) is equal to the voltage (V) across the circuit divided by the resistance (R), or ( I = \frac{V}{R} ). This relationship indicates that if the voltage remains constant while the resistance increases, the current must decrease.

As resistance rises, it becomes more difficult for electric charges to flow through the circuit. Consequently, the overall flow of current reduces in response to the increased opposition that resistance provides. Therefore, as you correctly identified, the current decreases when resistance is increased, assuming the voltage stays constant. This fundamental principle is essential in understanding circuit behavior and design in electrical engineering.