**A. 10.9 V**

B. 1.09 V

C. 1.1 V

D. 12 V

# Passive Filters

## 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_____________?

A. 723 Hz

B. 7,234 Hz

C. 362 Hz

**D. 3,617 Hz**

## A parallel resonant band-pass filter consists of a 90 Ω resistor in series with a parallel network made up of a 60 mH coil and a 0.02 µF capacitor. The output is taken across the capacitor/coil. The coil winding has a resistance of 20 Ω. What is the center frequency of the filter?

A. 459 Hz

**B. 4,591 Hz**

C. 999 Hz

D. 2,176 Hz

## In a series resonant band-pass filter, a lower value of Q results in______________?

A. a higher impedance

B. a smaller bandwidth

C. a higher resonant frequency

**D. a larger bandwidth**

## In a certain low-pass filter, fc = 3.5 kHz. Its passband is____________?

A. 3.5 kHz

B. 0 Hz

**C. 0 Hz to 3.5 kHz**

D. 7 kHz

## An RC low-pass filter consists of a 120 Ω resistor and a 0.002 µF 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

## 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?

A. 0 V

**B. 5.97 V**

C. 6 V

D. 597 mV

## 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______________?

**A. 93.8 kHz**

B. 93.8 Hz

C. 861 Hz

D. 86.12 kHz

## An RC high-pass filter consists of an 820 Ω resistor. What is the value of C so that Xc is ten times less than Rat an input frequency of 12 kHz?

A. 81 µF

B. 161 µF

**C. 0.161 µF**

D. 220 µF