Total circuit resistance in a series circuit is equal to which of the following?

In a series circuit, the total resistance arises from the sum of all individual resistances connected in the same path. This is because the current that flows through the circuit must pass through each resistor one after the other, and thus their resistances add up. Each resistor impedes the flow of current, and the total resistance is effectively a cumulative effect of all resistive components in the circuit.

By calculating the total resistance as the sum of all resistances, you ensure that you account for the full impedance to the current in that particular pathway. It’s important in understanding how the circuit behaves when a voltage is applied, as it directly influences the amount of current that flows through the circuit according to Ohm's Law (V = IR). Therefore, recognizing that the total resistance is simply the sum of individual resistances in a series circuit is fundamental to analyzing and predicting circuit behavior.