This is the Multiple Choice Questions (MCQs) in Chapter 11: Capacitance from the book Teach Yourself Electricity and Electronics, 5th edition by Stan Gibilisco. If you are looking for a reviewer in Electronics Engineering this will definitely help you before taking the Board Exam.
Start Practice Exam Test Questions
1. Capacitance acts to store electrical energy as:
- A. Current.
- B. Voltage.
- C. A magnetic field.
- D. An electric field.
2. As capacitor plate area increases, all other things being equal:
- A. The capacitance increases.
- B. The capacitance decreases.
- C. The capacitance does not change.
- D. The voltage-handling ability increases.
3. As the spacing between plates in a capacitor is made smaller, all other things being equal:
- A. The capacitance increases.
- B. The capacitance decreases.
- C. The capacitance does not change.
- D. The voltage-handling ability increases.
4. A material with a high dielectric constant:
- A. Acts to increase capacitance per unit volume.
- B. Acts to decrease capacitance per unit volume.
- C. Has no effect on capacitance.
- D. Causes a capacitor to become polarized.
5. A capacitance of 100 pF is the same as:
- A. 0.01 μF.
- B. 0.001 μF.
- C. 0.0001 μF.
- D. 0. 00001 μF.
6. A capacitance of 0.033 μF is the same as:
- A. 33 pF.
- B. 330 pF.
- C. 3300 pF.
- D. 33,000 pF.
7. Five 0.050-μF capacitors are connected in parallel. The total capacitance is:
- A. 0.010 μF.
- B. 0.25 μF.
- C. 0.50 μF.
- D. 0.025 μF.
8. If the same five capacitors are connected in series, the total capacitance will be:
- A. 0.010 μF.
- B. 0.25 μF.
- C. 0.50 μF.
- D. 0.025 μF.
9. Two capacitors are in series. Their values are 47 pF and 33 pF. The composite value is:
- A. 80 pF.
- B. 47 pF.
- C. 33 pF.
- D. 19 pF.
10. Two capacitors are in parallel. Their values are 47 pF and 470 μF. The combination capacitance is:
- A. 47 pF.
- B. 517 pF.
- C. 517 μF.
- D. 470 μF.
11. Three capacitors are in parallel. Their values are 0.0200 μF, 0.0500 μF and 0.10000 μF. The total capacitance is:
- A. 0.0125 μF.
- B. 0.170 μF.
- C. 0.1 μF.
- D. 0.125 μF.
12. Air works well as a dielectric mainly because it:
- A. Has a high dielectric constant.
- B. Is not physically dense.
- C. Has low loss.
- D. Allows for large capacitance in a small volume.
13. Which of the following is not a characteristic of mica capacitors?
- A. High efficiency.
- B. Small size.
- C. Capability to handle high voltages.
- D. Low loss.
14. A disk ceramic capacitor might have a value of:
- A. 100 pF.
- B. 33 μF.
- C. 470 μF.
- D. 10,000 μF.
15. A paper capacitor might have a value of:
- A. 0.001 pF.
- B. 0.01 μF.
- C. 100 μF.
- D. 3300 μF.
16. An air-variable capacitor might have a range of:
- A. 0.01 μF to 1 μF.
- B. 1 μF to 100 μF.
- C. 1 pF to 100 pF.
- D. 0.001 pF to 0.1 pF.
17. Which of the following types of capacitors is polarized?
- A. Paper
- B. Mica.
- C. Interelectrode.
- D. Electrolytic.
18. If a capacitor has a negative temperature coefficient:
- A. Its value decreases as the temperature rises.
- B. Its value increases as the temperature rises.
- C. Its value does not change with temperature.
- D. It must be connected with the correct polarity.
19. A capacitor is rated at 33 pF, plus or minus 10 percent. Which of the following capacitances is outside the acceptable range?
- A. 30 pF.
- B. 37 pF.
- C. 35 pF.
- D. 31 pF.
20. A capacitor, rated at 330 pF, shows an actual value of 317 pF. How many percent off is its value?
- A. 0.039.
- B. 3.9.
- C. 0.041.
- D. 4.1.
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