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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 millionth of an ampere.






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






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






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






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






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






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






8. The rotating member of an electrical machine.






9. 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.






10. 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.






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






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






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






14. Those electrons in orbits farthest out from the nucleus - loosely bound and migrate from one atom to another.






15. One- thousandth of a ampere






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






17. A unit of power.






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






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






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






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






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






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






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






25. One millionth of an ohm.






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






27. 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.






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






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






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






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






32. 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.






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






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






35. One millionth of a volt.






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






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






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






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






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






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






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






43. 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.






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






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






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






47. A measuring device.






48. Opposition to current flow






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






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