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Basic Electricity Vocab

Subject : engineering
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. A unit of power; equal to 550 foot- pounds per second of approximately 746 watts.

2. A device which capacity is its chief electrical property; a device for storing or holding an electric charge; a capacitor.

3. Fundamental constituents of matter. The 'elements' (tiny particles) which come together in various combinations to form molecules of many substances.

4. The difference between the electrical condition of one point in an electric circuit and that of another point which tends to cause current to flow between two points. Measured in volts.

5. An instrument for measuring electromotive force in volts. It must be connected across the load that causes the votage drop.

6. The unit of resistance. It is the resistance through which a voltage of 1 volt will produce a current of 1 ampere.

7. A machine which utilizes magnetism to produce an EMF and consequently - an electric circuit.

8. A certain force exhibited by some materials which give them the ability to attract other materials. Principally iron or its alloys.

9. A connection of circuit of low resistance. Current through each of the end- to- end devices is exactly the same. Only one path for the current.

10. Lines representing the direction of the magnetic force in a magnetic field.

11. Occurs when a stream of electrons are caused to move through a conductor.

12. The condition where the free electrons are caused to move in the same direction along or through a conductor.

13. Rate of electrons flow (current flow). When one 'Coulomb' of electrons pass a given point in one second.

14. A material which can be magnetized - principally iron.

15. A device used to change the voltage of an alternating current circuit.

16. A complete sequence of events - as an alternating- current cycle.

17. The part of the magnet where the magnetic force is most concentrated. Commonly referred to as the North or South pole or the positive or negative poles)

18. That property of a material which determines how readily it conducts magnetic lines of flux. Opposite magnetic quality or conductivity.

19. Electric charges at rest. Caused by friction of materials - where a surplus of electrons exists and may be discharged.

20. One- thousandth of volt.

21. An alternating current which current cycle begins later that its voltage cycle.

22. Single POSITIVE electrical charge - located in the middle of an atom.

23. An instrument for measuring electric current

24. A circuit with only one path for current to flow. There are no branches.

25. A current limiting device designed to melt and break the circuit when a specified current is exceeded. (The weakest point in a circuit)

26. A circuit with more than one path. Current branches to flow in every available path.

27. One millionth of a volt.

28. A resistor designed so that its resistance is readily adjusted.

29. Coil connected to the source of power on a transformer.

30. The time rate at which work is done or energy is transferred. When a pressure of 1 volt sends a current of 1 ampere through a resistance of 1 ohm - the power in the circuit is said to be 1 watt.

31. (Lode Stone) Certain type of mineral ore which has the natural Properties of a magnet.

32. Invisible lines along which magnetic energy travels from one pole of a magnet to the other.

33. In a battery - the electrode which takes up the electrons returning from the external circuit.

34. The opposite ends of a magnet where the magnetism is concentrated. Each magnet has two poles - designated as north and south.

35. Several secondary cells connected together for either a greater voltage or current output.

36. The area surrounding a magnet in which magnetic properties are exhibited

37. The number of cycles per second. Example: 60 cycles per second alternating current.

38. A unit of work or ENERGY. 1 kilowatt hour = 1 -000 watt hours

39. A transformer designed to raise the voltage of an alternating current. Most common use; In a generating plant to raise the voltage.

40. A material with few free electrons. A structure or material used to prevent the passage of current.

41. A cell which is composed of certain materials which are used up during the process of delivering electric current.

42. In an electrical circuit - or part of an electric circuit - the intensity of the current is equal to the electromotive force that drives it divided by the resistance of the circuit.

43. An instrument for measuring electrical power. Most common use: The meter of your house to measure electrical consumption.

44. The moving part of a dynamo or motor consisting of coils of wire around an iron core.

45. The rotating member of an electrical machine.

46. The center portion of an atom which has a positive electrical charge.

47. A circuit in which there is resistance (load) connected both in series and parallel.

48. Positive charge of electricity. Located in the nucleus of the atom.

49. Hardened steel which has been magnetized artificially and which retains its magnetic properties

50. Transformer coil connected to the load. (Output side of a transformer regardless of voltage).