High frequency filtering using a capacitor and inductor.

High frequency filtering using a capacitor and inductor. This demonstration shows how high frequency A.C. signals (2500 Hz) are affected by a series inductor or a capacitor in parallel. A variable audio oscillator is connected via coax cable to the back of the demo board. The board is set up with switches on back so that an inductor can be placed in series with the speaker, or a capacitor can be placed in parallel with the speaker. When no switch is pressed, neither the capacitor nor inductor is in the circuit. When either the 1000 micro f capacitor or 4mH inductor is in the circuit, the audio signal to the speaker is significantly reduced.