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

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

3. One- thousandth of volt.

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

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

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

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

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

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

10. The electrodes of a cell shaped as plates to expose a surface as possible to the electrolyte.

11. 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)

12. The unit of electromotive force - potential - pressure - or voltage which produces a current of one ampere in a circuit having a resistance of 1 ohm. This is the force created to move electrons through a circuit.

13. The rotating member of an electrical machine.

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

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

16. Negative charge of electricity

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

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

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

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

21. A rod or strip composed of two metals having different rates or coefficients of expansion. Upon being heated - it bends in a direction which causes the material with the greater rate of expansion to be on the outside.

22. A measuring device.

23. 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.

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

25. A material that has many free electrons thus allowing electric current to flow through it easily.

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

27. One- thousandth of a ampere

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

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

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

31. Smallest part a substance can physically divided into composed of 2 or more atoms.

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

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

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

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

36. 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.

37. Total and complete opposition to the flow of electrons

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

39. The unit of Electro- Motive Force

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

41. Opposition to current flow

42. 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.

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

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

45. One millionth of an ohm.

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

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

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

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

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