Electrical Engineering - Passive Filters

Exercise :: Passive Filters - General Questions

6. 

An RL high-pass filter consists of a 470 resistor and a 600 mH coil. The output is taken across the coil. The circuit's critical frequency is

A. 125 Hz
B. 1,250 Hz
C. 564 Hz
D. 5,644 Hz

Answer: Option A

Explanation:

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7. 

A parallel resonant band-pass filter consists of a 6.8 resistor in series with a parallel network made up of an 8 H coil and a 120 pF capacitor. The output is taken across the capacitor/coil. Assume RW = 0 . What is the center frequency of the filter?

A. 5.14 MHz
B. 514 kHz
C. 5.03 MHz
D. 503 kHz

Answer: Option A

Explanation:

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8. 

A series resonant band-pass filter consists of a 2 mH coil, a 0.005 F capacitor, and a 120 resistor. The winding resistance of the coil is 12 . The output voltage is taken off the resistor. Input voltage is 12 Vrms. What is the output voltage magnitude at the center frequency (f0)?

A. 10.9 V
B. 1.09 V
C. 1.1 V
D. 12 V

Answer: Option A

Explanation:

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9. 

An RC low-pass filter consists of a 120 resistor and a 0.002 F capacitor. The output is taken across the capacitor. The circuit's critical frequency is

A. 333 kHz
B. 633 kHz
C. 331 kHz
D. 60 kHz

Answer: Option B

Explanation:

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10. 

Referring to Problem 15, if the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?

A. 6 V
B. 597 mV
C. 5.97 V
D. 0 V

Answer: Option C

Explanation:

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