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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. One- thousandth of a ampere






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






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






4. 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.


5. 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.






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






7. Iron and certain alloys of iron which are magnetized by artificial means.






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






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






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






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






12. One millionth of a volt.






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






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






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






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






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






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






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






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






21. The process of producing an electromotive force in a conductor as a result of the cutting of magnetic lines of force by a conductor.






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






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






24. A single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of an atom.






25. 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.






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






27. An instrument for measuring electric current






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






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






30. 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.






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






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






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






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






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






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






37. The unit of Electro- Motive Force






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






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






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






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






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






44. The condition where the free electrons are caused to move in the same direction along or through a conductor.






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






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


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






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






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






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