If the total voltage applied to a series circuit is constant, what happens when the resistance increases?

In a series circuit, the total voltage remains constant according to Ohm's Law, which states that Voltage (V) = Current (I) × Resistance (R). When the resistance in a series circuit increases while the total voltage remains constant, the current flowing through the circuit must decrease. This is because the voltage is distributed across all the resistive components in the circuit.

As resistance increases, more of the applied voltage is needed to push the same current through the circuit. Since the supply voltage doesn’t change, the only way to balance the equation is for the current (I) to decrease. This is consistent with the inverse relationship between current and resistance in a circuit, where an increase in resistance leads to a corresponding decrease in current, assuming that voltage stays constant.

Therefore, when resistance increases in a series circuit with a constant voltage, the current indeed decreases.