When multiple capacitors are connected, they share the same current or electric charge, but the different voltage is known as series connected capacitors or simply capacitors in series.
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With series connected capacitors, the capacitive reactance of the capacitor acts as an impedance due to the frequency of the supply. This capacitive reactance produces a voltage drop across
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So, the analysis of the capacitors in series connection is quite interesting and plays a crucial role in electronic circuits. When multiple capacitors are connected, they share the same current or electric charge, but the different voltage is known as series connected capacitors or simply capacitors in series.
As for any capacitor, the capacitance of the combination is related to both charge and voltage: C = Q V. (8.3.1) (8.3.1) C = Q V. When this series combination is connected to a battery with voltage V, each of the capacitors acquires an identical charge Q.
Combining capacitors in series reduces the total capacitance, and isn't very common, but what are some possible uses for it? It shouldn't be used to increase the voltage rating, for instance, since you can't guarantee that the middle will be at half the DC voltage of the total, without using bleeder resistors.
With series connected resistors, the sum of all the voltage drops across the series circuit will be equal to the applied voltage VS ( Kirchhoff’s Voltage Law ) and this is also true about capacitors in series. With series connected capacitors, the capacitive reactance of the capacitor acts as an impedance due to the frequency of the supply.
However, when the series capacitor values are different, the larger value capacitor will charge itself to a lower voltage and the smaller value capacitor to a higher voltage, and in our second example above this was shown to be 3.84 and 8.16 volts respectively.
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