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

2. An instrument for measuring electric current

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

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

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

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

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

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

9. Negative charge of electricity

10. The voltage dissipation between any two points in a circuit. The voltage 'dropped' or 'dissipated' in forcing current through a resistance.

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

12. A measuring device.

13. The magnetism which a material retains after the magnetic force which magnetized it has been removed.

14. A complete path provided for the flow of electrons. Consists of a source - with a closed conducting path leading from the source and back to the source

15. The process of producing an electromotive force in a conductor as a result of the cutting of magnetic lines of force by a conductor.

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

17. The rotating member of an electrical machine.

18. A single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of an atom.

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

20. A rate of movement of electrons through a conductor.

21. Iron and certain alloys of iron which are magnetized by artificial means.

22. The property of a material that opposes the flow of current.

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

24. One millionth of an ohm.

25. One millionth of a volt.

26. Those electrons in orbits farthest out from the nucleus - loosely bound and migrate from one atom to another.

27. A circuit carrying three alternating currents whose cycles begin one after another. 120 electrical degrees apart.

28. Any of the spaces occupied by the orbits of a group of electrons of approximately equal energy surronding the nucleus of an atom.

29. A circuit with two or more paths for the current to take.

30. One millionth of an ampere.

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

32. A very low resistance path placed in a circuit in such a manner as to allow an excessive current flow.

33. Those electrons in orbit nearest the nucleus - not easily dislodged from their normal orbits.

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

35. A unit of power; equal to 550 foot- pounds per second of approximately 746 watts.

36. 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.

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

38. 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.

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

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

41. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field

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

43. Shows relationship between Current - Voltage - Wattage and Resistance.

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

45. The unit of Electro- Motive Force

46. The complete path through which the lines of force travel - leaving the north pole and re- entering the south pole.

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

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

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

50. The liquid solution (sometime a paste) in which the electrodes are placed.