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






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

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






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






5. Negative charge of electricity






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






7. 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.






8. One millionth of a volt.






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






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






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






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






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






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






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






16. The rotating member of an electrical machine.






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

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18. One- thousandth of a ampere






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






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






21. Opposition to current flow






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






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






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






25. 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.






26. Total and complete opposition to the flow of electrons






27. A unit of power; equal to 550 foot- pounds per second of approximately 746 watts.






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






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






30. A measuring device.






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






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






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






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






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






36. One million ohms.






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






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






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






40. 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.






41. One millionth of an ohm.






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






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






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






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






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






47. 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.






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






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






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