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Basic Electricity Vocab

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. Electric charges at rest. Caused by friction of materials - where a surplus of electrons exists and may be discharged.






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






3. A measuring device.






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






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






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






7. Certain quantity of electrons. The unit of measure that specifies the rate at which electric current flows per second.






8. 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






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






10. 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.






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






12. One millionth of a volt.






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






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






15. 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.

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






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






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






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






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






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






22. One millionth of an ampere.






23. 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.






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






25. One- thousandth of volt.






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






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






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






29. 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.






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






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






32. The unit of Electro- Motive Force






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






34. One- thousandth of a ampere






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






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






37. Total and complete opposition to the flow of electrons






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






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






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






41. Negative charge of electricity






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






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






44. 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.






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






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






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






48. Opposition to current flow






49. 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.






50. An alternating current which current cycle begins earlier than its voltage cycle.