Nate Electrical Practice Exam

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What is the total capacitance of two 20-microfarad capacitors wired in parallel?

5 mf
10 mf
20 mf
40 mf

The correct answer is: 40 mf

When capacitors are connected in parallel, the total capacitance is simply the sum of the individual capacitances. This is because each capacitor in parallel provides an additional path for the charge to store, effectively increasing the overall capacitance. In this case, you have two 20-microfarad capacitors. To calculate the total capacitance, you add the capacitances together: Total Capacitance = Capacitance of Capacitor 1 + Capacitance of Capacitor 2 Total Capacitance = 20 µF + 20 µF = 40 µF Thus, the total capacitance of the two 20-microfarad capacitors wired in parallel is 40 microfarads. This principle can be applied to any number of capacitors in parallel where you simply add their capacitance values to find the total.