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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. One- thousandth of a ampere

2. One million ohms.

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

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

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

6. 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.

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

8. 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.

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

10. 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.

11. A unit of power.

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

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

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

15. 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.

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

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

18. 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.

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

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

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

22. A short circuit between two energized conductors and/or an energized conductor and a grounded phase. Very high current flow.

23. One millionth of an ampere.

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

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

26. A measuring device.

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

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

29. One- thousandth of volt.

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

31. 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.

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

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

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

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

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

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

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

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

40. The unit of Electro- Motive Force

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

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

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

44. Total and complete opposition to the flow of electrons

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

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

47. 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.

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

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

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