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

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

3. Total and complete opposition to the flow of electrons

4. 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)

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

6. A current which reverses in direction at regularly recurring intervals - the total flow in one direction being equal to that in the other direction.

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

8. A cell which is rechargeable. Uses materials which change in compostition during delivery of current - but may be restored to original condition upon recharge.

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

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

11. Opposition to current flow

12. The dissimilar metals which are placed in an electrolyte to form a cell.

13. A coil of wire designed to act as a magnet as a result of carrying an electrical current. It is usually wound on a soft iron core.

14. Term applied to the loss of voltage in forcing current through any portion of a circuit. Different factors will cause a drop; material - size - (cross - sectional area) length - temperature.

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

16. The path of an electric current. To permit a steady flow of current - the path must be complete. Commonly - a complete circuit includes a device for the production of an electromotive force - connecting wires - and a device supplied with electricity.

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

18. Any device which may be placed in the circuit and which offers opposition to the flow of electrons around the circuit.

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

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

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

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

23. 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.

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

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

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

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

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

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

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

31. One millionth of an ohm.

32. One millionth of an ampere.

33. A generator that produces alternating current.

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

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

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

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

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

39. A unit of POWER. 1 kilowatt = 1 -000 watts

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

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

42. One- thousandth of volt.

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

44. Single NEGATIVE electrical charge. Orbits around the nucleus some in paths close to the nucleus - others in paths varying distance from the nucleus.

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

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

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

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

49. One- thousandth of a ampere

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