MCQOPTIONS
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MCQOPTIONS
This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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_____________? |
| A. | 723 Hz |
| B. | 7,234 Hz |
| C. | 362 Hz |
| D. | 3,617 Hz |
| Answer» E. | |
| 2. |
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? |
| A. | 0 V |
| B. | 5.97 V |
| C. | 6 V |
| D. | 597 mV |
| Answer» C. 6 V | |
| 3. |
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? |
| A. | 459 Hz |
| B. | 4,591 Hz |
| C. | 999 Hz |
| D. | 2,176 Hz |
| Answer» C. 999 Hz | |
| 4. |
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? |
| A. | 5.14 MHz |
| B. | 514 kHz |
| C. | 5.03 MHz |
| D. | 503 kHz |
| Answer» B. 514 kHz | |
| 5. |
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____________? |
| A. | 12.73 V peak-to-peak |
| B. | 18 V peak-to-peak |
| C. | 9 V peak-to-peak |
| D. | zero |
| Answer» C. 9 V peak-to-peak | |
| 6. |
Vout = 500 mV, and Vin = 1.3 V. The ratio Vout/ Vin expressed in dB is__________? |
| A. | 0 dB |
| B. | 8.30 dB |
| C. | -8.30 dB |
| D. | 0.8 dB |
| Answer» D. 0.8 dB | |
| 7. |
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______________? |
| A. | 93.8 kHz |
| B. | 93.8 Hz |
| C. | 861 Hz |
| D. | 86.12 kHz |
| Answer» B. 93.8 Hz | |
| 8. |
In a certain low-pass filter, fc = 3.5 kHz. Its pass-band is_______________? |
| A. | 0 Hz to 3.5 kHz |
| B. | 0 Hz |
| C. | 3.5 kHz |
| D. | 7 kHz |
| Answer» B. 0 Hz | |
| 9. |
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_____________? |
| A. | 6.02 dB |
| B. | -6.02 dB |
| C. | 12.04 dB |
| D. | -12.04 dB |
| Answer» C. 12.04 dB | |
| 10. |
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? |
| A. | 0 V |
| B. | 5.97 V |
| C. | 6 V |
| D. | 597 mV |
| Answer» C. 6 V | |
| 11. |
In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency_____________? |
| A. | is 7 kHz |
| B. | is 10 kHz |
| C. | is 12 kHz |
| D. | cannot be determined |
| Answer» D. cannot be determined | |
| 12. |
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 Vrms. What is the output voltage magnitude at the center frequency (f0)? |
| A. | 10.9 V |
| B. | 1.09 V |
| C. | 1.1 V |
| D. | 12 V |
| Answer» B. 1.09 V | |
| 13. |
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___________? |
| A. | 125 Hz |
| B. | 1,250 Hz |
| C. | 564 Hz |
| D. | 5,644 Hz |
| Answer» B. 1,250 Hz | |
| 14. |
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? |
| A. | 1.1 mV |
| B. | 11.1 mV |
| C. | 111 mV |
| D. | 200 mV |
| Answer» C. 111 mV | |
| 15. |
In a certain low-pass filter, fc = 3.5 kHz. Its passband is____________? |
| A. | 3.5 kHz |
| B. | 0 Hz |
| C. | 0 Hz to 3.5 kHz |
| D. | 7 kHz |
| Answer» D. 7 kHz | |
| 16. |
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___________? |
| A. | 333 kHz |
| B. | 633 kHz |
| C. | 331 kHz |
| D. | 60 kHz |
| Answer» C. 331 kHz | |
| 17. |
At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V.the filter’s bandwidth is____________? |
| A. | 530 Hz |
| B. | 106 Hz |
| C. | 11.5 Hz |
| D. | 53 Hz |
| Answer» E. | |
| 18. |
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____________? |
| A. | 18 V peak-to-peak |
| B. | zero |
| C. | 9 V peak-to-peak |
| D. | 12.74 V peak-to-peak |
| Answer» C. 9 V peak-to-peak | |
| 19. |
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? |
| A. | 81 µF |
| B. | 161 µF |
| C. | 0.161 µF |
| D. | 220 µF |
| Answer» D. 220 µF | |
| 20. |
In a series resonant band-pass filter, a lower value of Q results in______________? |
| A. | a higher impedance |
| B. | a smaller bandwidth |
| C. | a higher resonant frequency |
| D. | a larger bandwidth |
| Answer» E. | |
| 21. |
The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is_____________? |
| A. | 10.60 V |
| B. | 0 V |
| C. | 21.21 V |
| D. | 15 V |
| Answer» B. 0 V | |