Engineering Board Exam Reviewer · Passive Filters · medium

A filter delivers 5 V at its output when 10 V is applied at its input. What is its voltage gain in decibels?

  1. -3.01 dB
  2. 6.02 dB
  3. -6.02 dB
  4. -12.04 dB

Answer

C. -6.02 dB

Solution

AdB=20 10 VoutVin=20 105/10=-6.02 dB.

More Passive Filters questions

  1. A filter passes 10 W in its passband. How much power does it pass at the cutoff frequency?
  2. The series RLC band-pass filter shown takes its output across the resistor, with L=10 mH, C=100 nF, and R=100, . Find its bandwidth.
  3. The series RLC band-pass filter shown takes its output across the resistor, with L=10 mH, C=100 nF, and R=100, . Find its center frequency.
  4. The gain plot of a first-order RC low-pass filter is shown (the red dot marks the cutoff frequency). If a 3 V rms signal at 10 kHz is…
  5. The RL high-pass filter shown uses R=470, and L=22 mH. Find its cutoff frequency.
  6. The RL low-pass filter shown uses R=10 k and L=100 mH. Find its cutoff frequency.
  7. Find the voltage gain, in decibels, of the RC low-pass filter shown (R=330, , C=100 nF) at 24.1 kHz.
  8. For the RC low-pass filter shown (R=6.8 k , C=22 nF), by how many degrees does the output voltage lag the input voltage at 3.19 kHz?
  9. An RC high-pass filter with C=470 nF and R=680, is driven by a 10 V rms sine wave at 124 Hz. Find the rms output voltage.
  10. 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.

All Passive Filters questions