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January 2019 StudentZone Quiz Solution

Question 1:

Compute the cut-off frequencies for each Band Reject filter constructed using the formula in equations (1) and (2). Compare these theoretical values to the ones obtained from the experiment and provide a suitable explanation for any differences.

Answer 1:

Considering the values used in the lab experiment R1 = 1 KΩ, C1 = 0.1 µF, L1 = 20 mH we can compute the frequency range as follows:

1. Lower cut-off frequency:

2. Higher cut-off frequency:

3. Resonant frequency:


What can you notice by computing individually each of the filter’s cut-off frequencies?