What is the formula for calculating the total resistance of resistors in series?

The total resistance of resistors connected in series is calculated by simply summing their individual resistances. This relationship arises because, in a series circuit, the same current flows through each resistor. Each resistor contributes to the total opposition to the flow of current, and thus, the total resistance is the sum: R_total = R1 + R2 + R3 + ... .

This concept is essential for understanding how series circuits operate. When you add more resistors in series, the overall resistance increases, which impacts the current flowing through the circuit according to Ohm's Law. In practice, if you were to connect several resistors in series, calculating the total resistance using this formula allows you to predict how the circuit will behave under a given voltage.