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Experiment 10 - Capacitors in Series II

Replace the capacitor C2 from the last experiment by a 10 μF capacitor Circuit with two series-connected electrolytic capacitors. (Enlarge) Circuit diagram of the circuit with two series-connected electrolytic capacitors.

The LEDs light up a little shorter than what you expect from a 10 μF capacitor. And indeed, you calculate the total capacity as...

Ctotal = ( C1 * C2 ) / ( C1 + C2 ) = ( 100 μF * 10 μF ) / ( 100 μF + 10 μF ) = 9 μF

The total capacity of a series circuit is always smaller than the smallest capacity in the circuit. If you replace the capacitor C2 by the 47 nF ceramic capacitor, you get a total capacity of slightly less than 47 nF.

If you want to understand the reasons, you should have a look at the topic capacitor in physics.

But first, enough is said about the properties of capacitors. In the following experiments you see where and how capacitors are used. Experiment 11 - Delay Circuit

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