What happens to the current when resistance is increased in a circuit?

When resistance in a circuit is increased, the current decreases due to Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). If the voltage remains constant and resistance is increased, the calculation shows that the current must decrease.

For instance, if you have a circuit with a certain voltage supply and you increase the resistance (by adding more resistors or changing to a higher resistant material), the flow of current through the circuit diminishes because there is more opposition (resistance) to the flow of electrons. This is a fundamental concept in electrical engineering and physics that highlights how changing one parameter in a circuit can directly affect another.

Thus, increasing the resistance leads to a lower current flow, confirming that the correct choice is that the current decreases.