A filter can be used to separate frequencies in a circuit. Two ways to do so is to use a high pass or low pass filter by adding a capacitor. We are able to test and show a filter in use by measuring the gain and voltage of a circuit with a capacitor.
First we set up a circuit for a high pass filter then a low pass filter according to the following diagrams.
This is what the circuit looked like set up
From measuring the voltage across the capacitor and resistor for a low high pass and low pass filter respectively, here are the results.
The graphs were created using a logarithmic scale and the gain can be seen as a function on the graph.
Conclusion:
Matching the theoretical gain of a high pass filter to our actual gain shows a close agreement which validates the theory of frequency filters.
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