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

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

3. 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.

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

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

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

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

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

10. A material which CANNOT be magnetized. Example: Wood - Glass - Brass - Rubber...

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

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

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

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

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

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

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

18. (EMF) The force created by an electric generator (or by other means) which causes current to flow. (Same as Voltage - Volts - Electric Potential - Pressure).

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

20. Total and complete opposition to the flow of electrons

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

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

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

24. The unit of Electro- Motive Force

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

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

27. Meter used to measure resistance in an electrical circuit.

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

29. A unit of power.

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

31. A generator that produces alternating current.

32. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature

33. One millionth of a volt.

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

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

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

37. A measuring device.

38. One- thousandth of a ampere

39. A transformer designed to lower voltage of an alternating current. Most common type of transformer used on a power system.

40. Negative charge of electricity

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

42. The space around a magnet in which the magnetic force is felt.

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

44. One million ohms.

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

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

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

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

49. 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

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