What happens to circuit current in a series if additional resistors are added?

When additional resistors are added in a series circuit, the total resistance in the circuit increases. Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R), illustrates how these factors interact. Specifically, as the total resistance increases while the voltage remains constant, the overall current flowing through the circuit decreases.

In this context, each resistor adds more opposition to the flow of electric charge, culminating in a higher total resistance. Therefore, with the supply voltage unchanged, the current must reduce to comply with the equation I = V/R. This is a fundamental principle of electricity that holds true in series circuits, making it clear why the current decreases when more resistors are introduced.