Schematic

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Instructions

  • Make connections as shown. The picture shows an LC filter with a load resistor.
  • You may use any other type of filter.
  • We apply a sine wave of a given frequency at the input of the filter and the same is measured by A1.
  • The output of the filter is measured by A2 and the ratio of amplitudes (the gain) is calculated.
  • This process is repeated for a range of frequencies and gain is plotted as a function of frequency.
  • To start with try C = 1µF, L = 1mH, R = 1000 Ω, Calculate $f_0 = \frac{1}{2 \pi \sqrt{L \times C}}$.
  • Try parallel and series LC combinations.