Q.1
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
Q.2
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
Q.3
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?
Q.4
In an RL low-pass filter, the output voltage is taken across the inductor and the output lags the input.
Q.5
The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is
Q.6
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
Q.7
In an RC high-pass filter, the output is taken across the resistor and the output leads the input.
Q.8
In an RL high-pass filter, the output is taken across the inductor and the output leads the input.
Q.9
In a series resonant band-pass filter, a lower value of Q results in
Q.10
Critical frequencies are also called -3 dB frequencies.
Q.11
A band-pass filter rejects all frequencies within a band between a lower and an upper critical frequency and passes all others.
Q.12
In a certain low-pass filter, fc = 3.5 kHz. Its pass-band is
Q.13
The roll-off rate of a basic RC or RL filter is 20 dB per decade.
Q.14
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?
Q.15
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?
Q.16
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
Q.17
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
Q.18
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
Q.19
The output voltage is 63.3% of its maximum at the critical frequencies.
Q.20
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
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