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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. An instrument for measuring electric current






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

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3. One- thousandth of volt.






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






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






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






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






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






9. An instrument for measuring electromotive force in volts. It must be connected across the load that causes the votage drop.






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






11. 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.






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






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






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






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






16. Negative charge of electricity






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






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






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






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






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






22. One- thousandth of a ampere






23. A unit of POWER. 1 kilowatt = 1 -000 watts






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






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






26. The rotating member of an electrical machine.






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






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






29. 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)






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






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






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






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






34. A resistor designed so that its resistance is readily adjusted.






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






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






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






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






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






40. One millionth of a volt.






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






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






43. Positive charge of electricity. Located in the nucleus of the atom.






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






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






46. 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.






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






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






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






50. One millionth of an ampere.