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






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






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






4. One millionth of a volt.






5. An instrument for measuring electric current






6. Single POSITIVE electrical charge - located in the middle of an atom.






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






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






9. A generator that produces alternating current.






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






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






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






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






14. 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.






15. A rate of movement of electrons through a conductor.






16. Negative charge of electricity






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






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






19. 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.






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






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






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






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






24. One- thousandth of volt.






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






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






27. One million ohms.






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






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






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






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






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






33. The part of the magnet where the magnetic force is most concentrated. Commonly referred to as the North or South pole or the positive or negative poles)






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






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






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






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






38. A measuring device.






39. 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.






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






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






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






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






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






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






46. 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.






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






48. A unit of power.






49. Total and complete opposition to the flow of electrons






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