NCEA Level 3 Electricity Practice Test 2026 – Comprehensive Exam Prep

For capacitors arranged in series, the total capacitance is determined using the formula \( \frac{1}{C_{\text{total}}} = \frac{1}{C_1} + \frac{1}{C_2} + \ldots \). This reflects the fact that when capacitors are connected in series, the overall effect on the capacitance is not a simple addition as it would be for resistors in series.

In this configuration, each capacitor's charge contributes to the total charge stored, but the voltage across the arrangement adds up. The inverse relation arises because the voltage (which is divided among all capacitors) affects how much total capacitance is available. As a result, the effective total capacitance of the series combination is always less than the smallest individual capacitor in that series. This formula captures that relationship accurately, allowing for correct calculations of capacitance in series circuits, ensuring that students and professionals can design and analyze circuits effectively.