Question: A sinusoidal voltage with a peak-to-peak value of 18 V is applied to an RC low-pass filter. If the reactance at the input frequency is zero, the output voltage is____________?

• 1. 18 V peak-to-peak
• 2. zero
• 3. 9 V peak-to-peak
• 4. 12.74 V peak-to-peak

Question: Vout = 500 mV, and Vin = 1.3 V. The ratio Vout/ Vin expressed in dB is__________?

• 1. 0 dB
• 2. 8.30 dB
• 3. -8.30 dB
• 4. 0.8 dB

Question: 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?

• 1. 5.14 MHz
• 2. 514 kHz
• 3. 5.03 MHz
• 4. 503 kHz

Question: 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?

• 1. 0 V
• 2. 5.97 V
• 3. 6 V
• 4. 597 mV

Question: 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______________?

• 1. 93.8 kHz
• 2. 93.8 Hz
• 3. 861 Hz
• 4. 86.12 kHz

Question: 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_____________?

• 1. 723 Hz
• 2. 7,234 Hz
• 3. 362 Hz
• 4. 3,617 Hz

Question: 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_____________?

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

Question: A series resonant band-pass filter consists of a 2 mH coil, a 0.005 µF capacitor, and a 120 Ω resistor. The winding resistance of the coil is 12 Ω. The output voltage is taken off the resistor. Input voltage is 12 Vrms. What is the output voltage magnitud

• 1. 10.9 V
• 2. 1.09 V
• 3. 1.1 V
• 4. 12 V

Question: A series resonant band-stop filter consists of a 68 Ω resistor, a 110 mH coil, and a 0.02 µF capacitor. The internal resistance, RW, of the coil is 4 Ω. Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is the

• 1. 1.1 mV
• 2. 11.1 mV
• 3. 111 mV
• 4. 200 mV

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

• 1. 3.5 kHz
• 2. 0 Hz
• 3. 0 Hz to 3.5 kHz
• 4. 7 kHz