1. A low-pass filter allows signals with frequencies: A. Higher than the cutoff frequency
B. Lower than the cutoff frequency
C. Equal to the cutoff frequency
D. Both higher and lower than the cutoff frequency
Answer: B. Lower than the cutoff frequency
2. In a low-pass filter, the cutoff frequency is the point at which the output signal is reduced by:
A. 6 dB
B. 3 dB
C. 10 dB
D. 12 dB
Answer: B. 3 dB
3. The primary application of a low-pass filter is to:
A. Block low-frequency signals
B. Block high-frequency signals
C. Pass only the high-frequency signals
D. Pass only the low-frequency signals
Answer: D. Pass only the low-frequency signals
4. A low-pass filter with a cutoff frequency of 1 kHz will allow frequencies:
A. Below 1 kHz to pass
B. Above 1 kHz to pass
C. Below and above 1 kHz equally
D. At 1 kHz only
Answer: A. Below 1 kHz to pass
5. A high-pass filter allows signals with frequencies: A. Higher than the cutoff frequency
B. Lower than the cutoff frequency
C. Equal to the cutoff frequency
D. Both higher and lower than the cutoff frequency
Answer: A. Higher than the cutoff frequency
6. In a high-pass filter, the cutoff frequency is the point at which the output signal is reduced by:
A. 6 dB
B. 3 dB
C. 10 dB
D. 12 dB
Answer: B. 3 dB
7. The main use of a high-pass filter is to:
A. Remove high-frequency noise from a signal
B. Remove low-frequency noise from a signal
C. Amplify high-frequency signals
D. Filter out both high and low frequencies
Answer: B. Remove low-frequency noise from a signal
8. A high-pass filter with a cutoff frequency of 500 Hz will allow frequencies:
A. Below 500 Hz to pass
B. Above 500 Hz to pass
C. Below and above 500 Hz equally
D. At 500 Hz only
Answer: B. Above 500 Hz to pass
9. A band-pass filter allows signals in a certain range of frequencies. This range is defined by:
A. A low-frequency cutoff and a high-frequency cutoff
B. Only the high-frequency cutoff
C. Only the low-frequency cutoff
D. The output amplitude of the signal
Answer: A. A low-frequency cutoff and a high-frequency cutoff
10. The frequency range of a band-pass filter is determined by:
A. The difference between the high and low cutoff frequencies
B. The mean of the high and low cutoff frequencies
C. The highest frequency only
D. The lowest frequency only
Answer: A. The difference between the high and low cutoff frequencies
11. Which of the following is true about a band-pass filter?
A. It allows all frequencies to pass through
B. It blocks all frequencies
C. It allows only a certain range of frequencies to pass
D. It allows only high frequencies to pass
Answer: C. It allows only a certain range of frequencies to pass
12. The bandwidth of a band-pass filter is defined as the difference between:
A. The low cutoff frequency and the center frequency
B. The high cutoff frequency and the low cutoff frequency
C. The center frequency and the high cutoff frequency
D. The center frequency and the low cutoff frequency
Answer: B. The high cutoff frequency and the low cutoff frequency
13. In an ideal low-pass filter, what happens to the signal as the frequency increases past the cutoff frequency?
A. The signal is amplified
B. The signal is completely blocked
C. The signal is attenuated
D. The signal remains constant
Answer: C. The signal is attenuated
14. Which of the following components is commonly used to create low-pass and high-pass filters?
A. Capacitors and resistors
B. Inductors only
C. Diodes only
D. Transistors only
Answer: A. Capacitors and resistors
15. The quality factor (Q) of a band-pass filter is a measure of:
A. The sharpness of the filter’s frequency response
B. The cutoff frequency
C. The total bandwidth
D. The total amount of signal passed through
Answer: A. The sharpness of the filter’s frequency response
16. A filter with a low-pass characteristic and a cutoff frequency of 100 Hz will allow signals below:
A. 100 Hz
B. 1000 Hz
C. 100 MHz
D. 1 kHz
Answer: A. 100 Hz
17. In a high-pass filter, the phase shift increases as the frequency: A. Decreases
B. Increases
C. Remains the same
D. Reaches the cutoff frequency
Answer: B. Increases
18. A filter with a narrow bandwidth has a:
A. High quality factor (Q)
B. Low quality factor (Q)
C. Wide frequency range
D. Low center frequency
Answer: A. High quality factor (Q)