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






2. The unit of Electro- Motive Force






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






4. 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.






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






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






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






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






9. One- thousandth of a ampere






10. Any device which may be placed in the circuit and which offers opposition to the flow of electrons around the circuit.






11. 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.






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






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






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






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






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






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






18. Negative charge of electricity






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






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

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






22. 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.

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






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






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






26. 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.






27. A measuring device.






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






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

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






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






32. One millionth of an ampere.






33. One million ohms.






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






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






36. One millionth of a volt.






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






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






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






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






41. Total and complete opposition to the flow of electrons






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






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






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






45. 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)






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






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






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






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






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