Theory and Principles of Electricity
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1. What is a general term for the variety of phenomena resulting from the presence and flow of electric charge?
2. Electricity, together with _________, constitutes the fundamental interaction known as electromagnetism.
3. What is anything that occupies space and has weight?
4. What are the four States of Matter?
4. Solids, Liquid, Gaseous, Plasma.
5. "A substance which cannot be reduced to a simpler substance by chemical means" is known as what?
6. When two or more elements are chemically combined, it becomes a what?
7. A combination of elements and compounds, not chemically combined, that can be separated by physical means is known as what?
8. Atoms are small particles that make up _________.
9. What are the three subatomic particles of an Atom?
9. Electrons, Protons, Neutrons.
10. Electrons have a _________ charge. Protons have a ________ charge. Neutrons have a ________ charge.
10. Negative, Positive, Neutral.
11. A chemical combination of two or more atoms is known as what?
12. A negative Ion is when an atom having more than its normal amount of
_________ acquires a ________ charge.
12. Electrons, Negative.
13. A Positive Ion is when an atom has less than its normal amount of ________.
14. What is an element which conducts electricity, and copper is the most common?
15. What is extremely high resistance to the flow of electricity?
16. What is all matter between a conductor and an insulator?
17. What is the process by which an atom gains or losses electrons?
18. Coulombs Law of Charges states that the amount of attracting or repelling force which acts between two electrically charged bodies in free space depends on what two things?
- - Their charges
- - The distance between them
19. What are the two types of charges?
19. Positive and negative.
20. What is a property of certain subatomic particles (e.g., electrons and protons) that interact with
electromagnetic fields and cause attractive and repulsive forces between them?
20. Electric Charge.
21. Like-charged objects _____, Opposite-charged objects ______.
21. Repel, Attract
22. What attracts pieces of Iron?
22. Magnetic materials.
23. What are the two magnet types?
23. Natural and Artificial.
24. What types of energy is contained by an object due to its motion?
24. Kinetic Energy.
25. What type of energy is contained by its object due to its position?
25. Positive Energy.
26. What is the difference between two points and measured in volts?
26. Electric Potential.
27. What are the six methods for producing voltage or Electromotive Force (EMF)?
- –Pressure (piezoelectricity)
- –Heat (thermoelectricity)
- –Light (photoelectricity)
- –Chemical action
28. What is needed to produce voltage through magnetism?
28. Magnetic Field, Conductor, Relative Motion.
29. What is composed of individual electronic components, such as resistors, transistors, capacitors, inductors and diodes, connected by conductive wires or traces through which electric current can flow?
29. Electric Circuit.
30. A Series current follows ___ path.
31. A parallel current will flow along ________ paths.
32. What is a current that does not change direction?
32. Direct Current (DC).
33. What is a current that alternates direction at a high rate?
33. Alternate Current (AC).
34. A break that exists preventing current flow (switch/break) is known as what?
34. Open Circuit.
35. Current is free to flow through a circuit is within what type of circuit?
35. Closed Circuit.
36. When no resistence exists in a circuit, then you have what type of circuit?
36. Short Circuit.
37. An electric current flows from ________ potential to ________ potential.
37. Negative to Positive.
38. Electric currents are measured in what?
39. What is the opposite of amps where the resistance is the opposite of current flow? Also measured in Ohms?
39. Electrical Resistance.
40. What are the two factors that affect resistance?
40. Type of Material and Conductor Length.
41. What are components built to provide resistance in a circuit?
42. What occurs when electric current is passed through a resistor and heat is developed within the resistor?
42. Wattage Rating.
43. Electric power is measured in what?
44. What is the rate at which energy is converted from the electrical enery (moving charges) to another form?
44. Electric Power.
45. In Ohm's Law, I = ?
45. I = Current (Amps).
46. In Ohm's Law, E = ?
46. E = Voltage (Volts).
47. In Ohm's Law, R = ?
47. R = Resistance (Ohms).
48. In Ohm's Law, P = ?
48. P = Power (Watts).
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