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






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






3. One- thousandth of a ampere






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






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






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


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






8. Opposition to current flow






9. 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.






10. Total and complete opposition to the flow of electrons






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


12. 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.






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






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






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






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






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






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






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






20. The rotating member of an electrical machine.






21. A unit of power.






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






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






24. 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.






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






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






27. The unit of Electro- Motive Force






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






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






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






31. 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.


32. 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.






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






34. One millionth of a volt.






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






36. The complete path through which the lines of force travel - leaving the north pole and re- entering the south pole.






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






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






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






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






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






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






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






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






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






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






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






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






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






50. One millionth of an ampere.