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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 unit of resistance. It is the resistance through which a voltage of 1 volt will produce a current of 1 ampere.






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






3. One- thousandth of a ampere






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






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






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






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






9. Negative charge of electricity






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






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






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






13. The unit of Electro- Motive Force






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






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






16. 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






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






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






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






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






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






22. Occurs when a stream of electrons are caused to move through a conductor.






23. 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.






24. A unit of power.






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






26. 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.






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






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






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






30. One- thousandth of volt.






31. 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)






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






33. Opposition to current flow






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


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






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






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






38. 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.






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






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






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






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






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






44. One millionth of an ohm.






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






46. One millionth of an ampere.






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






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






49. 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.






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