Engineering Board Exam Reviewer · Passive Filters · medium
An RC low-pass filter with R=470, and C=1, F is driven by a 10 V rms sine wave at 677 Hz. Find the rms output voltage.
- 7.07 V
- 5 V
- 4.47 V
- 5.53 V
Answer
C. 4.47 V
Solution
fc=1/2π RC=339 Hz. VoutVin= 1sqrt(1+(f/fc)2)= 1 1+(677 Hz/339 Hz)2, so Vout=4.47 V.
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