MCQOPTIONS
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MCQOPTIONS
This section includes 63 Mcqs, each offering curated multiple-choice questions to sharpen your Active Filter Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Refer to this figure. The capacitor C 3 affects |
| A. | high-frequency response. |
| B. | low-frequency response. |
| C. | midrange response. |
| D. | nothing. |
| Answer» C. midrange response. | |
| 52. |
The lower critical frequency is also known as the |
| A. | break frequency. |
| B. | cutoff frequency. |
| C. | corner frequency. |
| D. | all of the above |
| Answer» E. | |
| 53. |
An amplifier has an input signal voltage of 0.054 mV. The output voltage is 12.5 V. The voltage gain in dB is |
| A. | 53.6 dB. |
| B. | 107.3 dB. |
| C. | 231 dB. |
| D. | 116 dB. |
| Answer» C. 231 dB. | |
| 54. |
What is the method that can be used to determine the values of f cl and f cu of an amplifier? |
| A. | five time constants |
| B. | step-response |
| C. | sinusoidal |
| D. | - |
| Answer» C. sinusoidal | |
| 55. |
Internal transistor junction capacitances affect the high-frequency response of amplifiers by |
| A. | reducing the amplifier's gain. |
| B. | introducing phase shift as the signal frequency increases. |
| C. | having no effect. |
| D. | reducing the amplifier's gain and introducing phase shift as the signal frequency increases. |
| Answer» E. | |
| 56. |
A certain amplifier has a bandwidth of 22.5 kHz with a lower cutoff frequency of 600 Hz. What is the value of f cu ? |
| A. | 600 Hz |
| B. | 22.5 kHz |
| C. | 23.1 kHz |
| D. | 21.9 kHz |
| Answer» D. 21.9 kHz | |
| 57. |
The phase shift through the input of an RC circuit approaches ________° as the frequency approaches zero. |
| A. | 0 |
| B. | 45 |
| C. | 180 |
| D. | 90 |
| Answer» E. | |
| 58. |
Each RC circuit causes the gain to drop at a rate of ________ dB/decade. |
| A. | 20 |
| B. | 10 |
| C. | 6 |
| D. | none of the above |
| Answer» B. 10 | |
| 59. |
Refer to this figure. The output voltage at f cl = 12 mV. What is the output voltage at the midpoint frequency? |
| A. | 12 mV |
| B. | 12 mV p-p |
| C. | 16.97 mV |
| D. | 8.48 mV |
| Answer» D. 8.48 mV | |
| 60. |
A roll-off of 20 dB per decade is equivalent to a roll-off of ________ per octave. |
| A. | 3 dB |
| B. | 13 dB |
| C. | 12 dB |
| D. | 6 dB |
| Answer» E. | |
| 61. |
An amplifier has an R in = 1.2 k . The coupling capacitor is 1 F. Determine the approximate lower cutoff frequency. |
| A. | 133 Hz |
| B. | 1.33 kHz |
| C. | 13.3 kHz |
| D. | 133 kHz |
| Answer» B. 1.33 kHz | |
| 62. |
Doubling the voltage gain causes a ________ dB ________. |
| A. | 10, increase |
| B. | 6, increase |
| C. | 10, decrease |
| D. | 6, decrease |
| Answer» C. 10, decrease | |
| 63. |
________ frequencies are values of frequency at which the RC circuits reduce the voltage gain to 70.7% of its midrange value. |
| A. | Critical |
| B. | Cutoff |
| C. | Corner |
| D. | all of the above |
| Answer» E. | |