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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. Opposition to current flow






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






3. One million ohms.






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






5. 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.






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






7. 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)






8. Transformer coil connected to the load. (Output side of a transformer regardless of voltage).






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






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






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






12. The rotating member of an electrical machine.






13. One- thousandth of volt.






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






15. 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.






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






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






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






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






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






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






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






23. Negative charge of electricity






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






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






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






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






28. 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






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






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






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






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






34. One millionth of a volt.






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






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






37. The number of cycles per second. Example: 60 cycles per second alternating current.






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






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






40. One millionth of an ohm.






41. 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.






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






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






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






45. 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.






46. An instrument for measuring electric current






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






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






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






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