What is the formula to calculate total resistance in a series circuit?

The formula for calculating the total resistance in a series circuit is based on the principle that in a series arrangement, the total resistance is simply the sum of the individual resistances connected in that circuit. When resistors are placed in series, the current flowing through each resistor is the same, and thus, the voltage across each resistor can be added up to find the total voltage across the entire circuit.

Therefore, the total resistance (Rt) in a series circuit is calculated as the sum of all resistances: Rt = R1 + R2 + R3. This formula signifies that each resistor contributes to the overall resistance, and the total resistance increases as more resistors are added in series.

This principle is crucial in electrical engineering and circuit design because it helps predict how components will behave in a circuit. Understanding this concept allows for better analysis of circuit functions and the determination of how different components affect overall circuit performance.