Chemical Engineering Mcqs


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  • A parallel resonant band-pass filter consists of a 6.8 Ω resistor in series with a parallel network made up of an 8 µH coil and a 120 pF capacitor. The output is taken across the capacitor/coil. Assume RW = 0 Ω. What is the center frequency of the filter?
  • In a certain low-pass filter, fc = 3.5 kHz. If the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?
  • An RL low-pass filter consists of a 5.6 mH coil and a 3.3 kΩ resistor. The output voltage is taken across the resistor. The circuit’s critical frequency is______________?
  • An RC high-pass filter consists of a 0.2 µF capacitor and a 220 Ω resistor. The output is taken across the resistor. The circuit’s critical frequency is_____________?
  • At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V. The voltage ratio in decibels is_____________?

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