Passive Filters MCQs with Explanations

False is the correct answer to “A band-stop filter passes frequencies between its lower and upper critical frequencies and rejects all others.”. This question is standard in competitive examination syllabi for Passive Filters.

True is the correct answer to “The bandwidth of a resonant filter is determined by the quality factor (Q) of the circuit and the resonant frequency.”. This question is standard in competitive examination syllabi for Passive Filters.

Is 12 kHz is the correct answer to “In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency”. This question is standard in competitive examination syllabi for Passive Filters.

-8.30 dB is the correct answer to “V out = 500 mV and V in = 1.3 V. The ratio $$\frac{{{{\text{V}}_{{\text{out}}}}}}{{{{\text{V}}_{{\text{in}}}}}}\,$$ expressed in dB is”. This question is standard in competitive examination syllabi for Passive Filters.

11.1 mV is the correct answer to “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 output voltage magnitude at f0”. This question is standard in competitive examination syllabi for Passive Filters.

A larger bandwidth is the correct answer to “In a series resonant band-pass filter, a lower value of Q results in”. This question is standard in competitive examination syllabi for Passive Filters.

True is the correct answer to “Critical frequencies are also called -3 dB frequencies.”. This question is standard in competitive examination syllabi for Passive Filters.

False is the correct answer to “A band-pass filter rejects all frequencies within a band between a lower and an upper critical frequency and passes all others.”. This question is standard in competitive examination syllabi for Passive Filters.

12 kHz is the correct answer to “In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency is”. This question is standard in competitive examination syllabi for Passive Filters.

0.161 µF is the correct answer to “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”. This question is standard in competitive examination syllabi for Passive Filters.

18 V peak-to-peak is the correct answer to “The same signal in Problem 2 is applied to an RC high-pass filter. If the reactance is zero at the input frequency, the output voltage is”. This question is standard in competitive examination syllabi for Passive Filters.

Zero is the correct answer to “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”. This question is standard in competitive examination syllabi for Passive Filters.

0 Hz to 3.5 kHz is the correct answer to “In a certain low-pass filter, fc = 3.5 kHz. Its pass-band is”. This question is standard in competitive examination syllabi for Passive Filters.

True is the correct answer to “The roll-off rate of a basic RC or RL filter is 20 dB per decade.”. This question is standard in competitive examination syllabi for Passive Filters.

10.9 V is the correct answer to “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 V rms . What is the output voltage magnitude at the center frequency (f 0 )”. This question is standard in competitive examination syllabi for Passive Filters.

True is the correct answer to “In an RC high-pass filter, the output is taken across the resistor and the output leads the input.”. This question is standard in competitive examination syllabi for Passive Filters.

True is the correct answer to “In an RL high-pass filter, the output is taken across the inductor and the output leads the input.”. This question is standard in competitive examination syllabi for Passive Filters.

-6.02 dB is the correct answer to “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”. This question is standard in competitive examination syllabi for Passive Filters.

False is the correct answer to “The output voltage is 63.3% of its maximum at the critical frequencies.”. This question is standard in competitive examination syllabi for Passive Filters.

633 kHz is the correct answer to “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”. This question is standard in competitive examination syllabi for Passive Filters.

10.60 V is the correct answer to “The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is”. This question is standard in competitive examination syllabi for Passive Filters.

3,617 Hz is the correct answer to “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”. This question is standard in competitive examination syllabi for Passive Filters.

93.8 kHz is the correct answer to “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”. This question is standard in competitive examination syllabi for Passive Filters.

125 Hz is the correct answer to “An RL high-pass filter consists of a 470 Ω resistor and a 600 mH coil. The output is taken across the coil. The circuit's critical frequency is”. This question is standard in competitive examination syllabi for Passive Filters.

False is the correct answer to “In an RC low-pass filter, the output voltage is taken across the resistor and the output lags the input voltage.”. This question is standard in competitive examination syllabi for Passive Filters.

5.97 V is the correct answer to “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”. This question is standard in competitive examination syllabi for Passive Filters.

False is the correct answer to “In an RL low-pass filter, the output voltage is taken across the inductor and the output lags the input.”. This question is standard in competitive examination syllabi for Passive Filters.

4,591 Hz is the correct answer to “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”. This question is standard in competitive examination syllabi for Passive Filters.

5.14 MHz is the correct answer to “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”. This question is standard in competitive examination syllabi for Passive Filters.