NEETS Module 02 Assignment 3: Capacitance

(Last Updated On: December 8, 2017)

NEETS Assignment 3: Capacitance

This is the Textbook Assignment: Chapter 3, “Capacitance” from the Module 2 — Introduction to Alternating Current and Transformers in Navy Electricity and Electronics Training Series (NEETS) . If you are looking for a reviewer in Electronics Engineering this will definitely help. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam.

Start Practice Exam Test Questions

Choose the letter of the best answer in each mcq.

1. Capacitance and inductance in a circuit are similar in which of the following ways?

  • A. Both oppose current
  • B. Both aid voltage
  • C. Both cause the storage of energy
  • D. Both prevent the storage of energy

2. Capacitance is defined as the property of a circuit that

  • A. opposes a change in voltage
  • B. aids a change in voltage
  • C. opposes a change in current
  • D. aids a change in current

3. A capacitor is a device that stores energy in a/an

  • A. electrostatic field
  • B. electromagnetic field
  • C. induced field
  • D. molecular field

4. Electrostatic fields have what effect on (a) free electrons, and (b) bound electrons?

  • A. (a) Attracts them to the negative charges (b) Frees them from their orbits
  • B. (a) Attracts them to the positive charges (b) Frees them from their orbits
  • C. (a) Attracts them to the negative charges (b) Distorts their orbits
  • D. (a) Attracts them to the positive charges (b) Distorts their orbits

5. The influence of a charge on an electron orbit is correctly depicted by which of the following illustrations?

NEETS Module 02 Assignment 3: Capacitance

6. Electrostatic lines of force radiate from a charged particle along what type of lines?

  • A. Straight lines
  • B. Curved lines
  • C. Elliptical lines
  • D. Orbital lines

9. Which of the following combinations describe(s) a simple capacitor?

  • A. Two copper plates separated by an iron plate
  • B. Two copper plates separated by a sheet of mica
  • C. Two iron plates separated by an air gap
  • D. Both B and C above

10. A capacitor that stores 6 coulombs of electrons when a potential of 2 volts is applied across its terminals has what total value of capacitance?

  • A. 12 farads
  • B. 8 farads
  • C. 3 farads
  • D. 6 farads

15. A capacitor of 0.0069 microfarad has which of the following capacitance values when measured in picofarads?

  • A. 0.000069 pF
  • B. 6900 pF
  • C. 6.9 x 10^-9 pF
  • D. Both B and C above, individually, are correct

16. Which of the following characteristics of a capacitor can be varied WITHOUT altering its capacitance?

  • A. Area of the plates
  • B. Thickness of the dielectric
  • C. Material of the dielectric
  • D. Thickness of the plates

17. Which of the following actions will increase the capacitance of a capacitor?

  • A. The plates are moved closer together
  • B. The plates are moved farther apart
  • C. The dielectric constant is decreased
  • D. Both B and C above

18. Two capacitors are identical with the exception of the material used for the dielectric. Which of the following combinations of dielectric material will cause capacitor (b) to have a larger capacitance than capacitor (a)?

  • A. (a) Glass (b) Paraffin paper
  • B. (a) Glycerine (b) Pure water
  • C. (a) Petroleum (b) Air
  • D. (a) Paraffin paper (b) Petroleum

19. Two capacitors are identical with the exception of the material used for the dielectric. Which of the following combinations of dielectric materials will cause the capacitors to have almost the same capacitance?

  • A. Glass, paraffin paper
  • B. Mica, petroleum
  • C. Vacuum, air
  • D. Petroleum, rubber

20. A capacitor is composed of two plates. Each plate has an area of 7 square inches. The plates are separated by a 2-inch thick paraffin paper dielectric. What is its capacitance?

  • A. 2.76 μF
  • B. 2.76 pF
  • C. 5.51 μF
  • D. 5.51 pF

21. The maximum voltage that can be applied to a capacitor without causing current flow through the dielectric is called

  • A. breaking voltage
  • B. limiting voltage
  • C. conduction voltage
  • D. working voltage

22. A capacitor with a working voltage of 300 volts would normally have what maximum effective voltage applied to it?

  • A. 200 volts
  • B. 250 volts
  • C. 300 volts
  • D. 350 volts

23. An ac voltage of 350 volts effective can be safely applied to a capacitor with which of the following working voltages?

  • A. 550 volts
  • B. 400 volts
  • C. 350 volts
  • D. 250 volts

24. Which, if any, of the following conditions may cause a capacitor to suffer power losses?

  • A. Dielectric hysteresis
  • B. Plate loading
  • C. Plate heating
  • D. None of these

25. Rapid reversals in the polarity of the line voltage applied to a capacitor will cause what type of capacitor power loss?

  • A. Dielectric-leakage
  • B. Dielectric-hysteresis
  • C. Plate-loading
  • D. Plate-leakage

26. What type of dielectric is LEAST sensitive to power dielectric-hysteresis losses?

  • A. Pure water
  • B. Air
  • C. Vacuum
  • D. Mica

27. As the current through a capacitor increases, which of the following types of capacitor losses will increase?

  • A. Dielectric-hysteresis
  • B. Dielectric-leakage
  • C. Plate-leakage
  • D. Plate-breakdown

49. A circuit contains four parallel connected capacitors of 33 μF each. What is the total capacitance of the circuit?

  • A. 8.3 μF
  • B. 33.0 μF
  • C. 183.0 μF
  • D. 132.0 μF

50. A circuit contains two series-connected capacitors of 15 μF, and 1500 pF. What is the total capacitance of the circuit?

  • A. 0.0015 pF
  • B. 150.0 pF
  • C. 0.0015 μF
  • D. 0.1500 μF

51. A circuit contains two 10 μF capacitors wired together in a parallel configuration. The two parallel-wired capacitors are wired in series with a 20 μF capacitor and a 20 Kilo-ohm resistor. Which of the following expresses the RC time constant for this circuit?

  • A. 0.2 sec
  • B. 2 sec
  • C. 20,000 sec
  • D. Both B and C above

52. How are fixed capacitors classified?

  • A. By their plate size
  • B. By their dielectric materials
  • C. By the thickness of their dielectric materials
  • D. By the thickness of their conductors

53. Which of the following types of capacitors are referred to as self-healing?

  • A. Ceramic
  • B. Paper
  • C. Oil
  • D. Mica

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