If resistance in a circuit increases, what effect does it have on amperage?

When resistance in a circuit increases, amperage decreases due to Ohm's Law, which states that current (amperage) is equal to voltage (V) divided by resistance (R). This relationship can be expressed with the formula I = V/R, where I represents the current in amperes, V is the voltage in volts, and R is the resistance in ohms.

As resistance increases while voltage remains constant, the overall current flowing through the circuit must decrease in order to maintain the equation's balance. Therefore, a higher resistance leads to a lower amperage because less current can flow through the circuit for a given amount of voltage. This principle is fundamental in understanding how electrical components interact within a circuit, particularly in applications where circuit safety and efficiency are critical.