BASIC ELECTRICAL THEORY EXAM

This exam will test you level of comprehension on the basic electrical theory section of the electrical training course.

1. The proton carries a single unit positive charge equal in magnitude to the electron charge.

• a. True
• b. False

2. The electrons attraction to the nucleus is called __________ .

• A. electrostatic field
• B. electrostatic attraction
• C. electrostatic force
• D. potential difference

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3. The Electrostatic Field is a force acting between charged objects that causes Them to repel or attract.

• a. True
• b. False

4. To produce current, the electrons must be moved by a potential difference.

• a. True
• b. False

5. Atoms with only one valence electron make good ____________ .

• A. Insulators
• B. Semiconductors
• C. Conductors
• D. Resistors

6. Conventional Current Flow is current flow from positive to negative potentials.

• a. True
• b. False

7. Electron current, or amperage, is described as the movement of free electrons through a
conductor.

• a. True
• b. False

8. Resistance is defined as all opposition to current flow.

• a. True
• b. False

9. In 1827, George Simon Ohm discovered that there was a definite relationship between voltage,
current, and resistance in an electrical circuit.

• a. True
• b. False

10. Magnetism is a result of ___________ spinning on their own axis around the nucleus.

• A. Protons
• B. Neutrons
• C. Electrons
• D. None of the above

11. In magnetic materials, the atoms have certain areas called domains.

• a. True
• b. False

12. Domains are aligned such that their electrons tend to spin in opposite directions.

• a. True
• b. False

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13. The law of magnetism states that like magnetic poles repel and unlike magnetic poles attract.

• a. True
• b. False

14. The group of magnetic field lines emitted outward from the north pole of a magnet is called
magnetic flux.

• a. True
• b. False

15. Air, which is nonmagnetic, has a very high BH profile.

• a. True
• b. False

16. The permeability (μ) of a magnetic material is the ratio of B to H.

• a. True
• b. False

17. The magnetic flux in an iron core lags behind the magnetizing force.

• a. True
• b. False

18. The hysteresis loop is a series of curves that show the characteristics of a magnetic material.

• a. True
• b. False

19. The maximum number of electrons that can fit in the outermost shell of any atom is 18.

• a. True
• b. False

20. The electrons in the outermost shell are called valence electrons.

• a. True
• b. False