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






2. 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.






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






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






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






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






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






8. 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.






9. One- thousandth of volt.






10. An instrument for measuring electric current






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






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






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






14. 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.






15. 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






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






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






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






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






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






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






22. A coil of wire designed to act as a magnet as a result of carrying an electrical current. It is usually wound on a soft iron core.






23. 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.






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






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






26. A unit of power.






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






28. 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.






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






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






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






32. The rotating member of an electrical machine.






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






34. A generator that produces alternating current.






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






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






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






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






39. Negative charge of electricity






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






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






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






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






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






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






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






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






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






49. The unit of Electro- Motive Force






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