Test your basic knowledge |

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






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






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






4. 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.






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






6. The rotating member of an electrical machine.






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






8. The unit of Electro- Motive Force






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






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






11. 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






12. A generator that produces alternating current.






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






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






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






16. Total and complete opposition to the flow of electrons






17. 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.


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






19. 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.






20. 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.






21. 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.






22. One millionth of an ohm.






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






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


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






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






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






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






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






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






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






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 earlier than its voltage cycle.






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






35. Negative charge of electricity






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






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






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






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






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






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






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






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






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






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






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






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






48. 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.






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






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