Q.1
An RC high-pass filter consists of a 0.2 µF capacitor and aΩ resistor. The output is taken across the resistor. The circuit's critical frequency is
  • 723 Hz
  • 7,234 Hz
  • 362 Hz
  • 3,617 Hz
Q.2
The maximum output voltage of a certain low-pass filter isV. The output voltage at the critical frequency is
  • 0 V
  • 15 V
  • 10.60 V
  • 21.21 V
Q.3
An RC low-pass filter consists of aΩ resistor and a 0.µF capacitor. The output is taken across the capacitor. The circuit's critical frequency is
  • 333 kHz
  • 633 kHz
  • 331 kHz
  • 60 kHz
Q.4
The output voltage is 63.of its maximum at the critical frequencies.
  • True
  • False
Q.5
At a certain frequency, the output voltage of a filter is 6 V and the input isV. The voltage ratio in decibels is
  • 6.02 dB
  • -6.02 dB
  • 12.04 dB
  • -12.04 dB
Q.6
In an RC high-pass filter, the output is taken across the resistor and the output leads the input.
  • True
  • False
Q.7
The roll-off rate of a basic RC or RL filter isdB per decade.
  • True
  • False
Q.8
In a certain low-pass filter, fc = 3.5 kHz. Its pass-band is
  • 0 Hz to 3.5 kHz
  • 0 Hz
  • 3.5 kHz
  • 7 kHz
Q.9
A sinusoidal voltage with a peak-to-peak value ofV is applied to an RC low-pass filter. If the reactance at the input frequency is zero, the output voltage is
  • 18 V peak-to-peak
  • Zero
  • 9 V peak-to-peak
  • 12.74 V peak-to-peak
Q.10
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
  • 18 V peak-to-peak
  • Zero
  • 9 V peak-to-peak
  • 12.73 V peak-to-peak
Q.11
An RC high-pass filter consists of anΩ resistor. What is the value of C so that Xc is ten times less than Rat an input frequency ofkHz?
  • 81 µF
  • 161 µF
  • 0.161 µF
  • 220 µF
Q.12
A band-pass filter rejects all frequencies within a band between a lower and an upper critical frequency and passes all others.
  • True
  • False
Q.13
Critical frequencies are also called -3 dB frequencies.
  • True
  • False
Q.14
In a series resonant band-pass filter, a lower value of Q results in
  • A higher resonant frequency
  • A smaller bandwidth
  • A higher impedance
  • A larger bandwidth
Q.15
A series resonant band-stop filter consists of aΩ resistor, amH coil, and a 0.µF capacitor. The internal resistance, RW, of the coil is 4 Ω. Input voltage ismV. Output voltage is taken across the coil and capacitor in series. What is the output voltage magnitude at f0?
  • 1.1 mV
  • 11.1 mV
  • 111 mV
  • 200 mV
Q.16
Vout =mV, and Vin = 1.3 V. The ratio Vout/ Vin expressed in dB is
  • 0 dB
  • 8.30 dB
  • -8.30 dB
  • 0.8 dB
Q.17
In a certain parallel resonant band-pass filter, the resonant frequency iskHz. If the bandwidth is 4 kHz, the lower frequency
  • Is 7 kHz
  • Is 10 kHz
  • Is 12 kHz
  • Cannot be determined
Q.18
A band-stop filter passes frequencies between its lower and upper critical frequencies and rejects all others.
  • True
  • False
Q.19
The bandwidth of a resonant filter is determined by the quality factor (Q) of the circuit and the resonant frequency.
  • True
  • False
Q.20
A parallel resonant band-pass filter consists of aΩ resistor in series with a parallel network made up of amH coil and a 0.µF capacitor. The output is taken across the capacitor/coil. The coil winding has a resistance ofΩ. What is the center frequency of the filter?
  • 459 Hz
  • 4,591 Hz
  • 999 Hz
  • 2,176 Hz
0 h : 0 m : 1 s