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






2. A complete sequence of events - as an alternating- current cycle.






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






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






5. A measuring device.






6. A generator that produces alternating current.






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






8. Total and complete opposition to the flow of electrons






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






10. The center portion of an atom which has a positive electrical charge.






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






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






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






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






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






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






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






18. One millionth of a volt.






19. One- thousandth of a ampere






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






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






22. 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






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






24. One millionth of an ohm.






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






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






27. 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.






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






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






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






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






32. Opposition to current flow






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






34. One- thousandth of volt.






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






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






37. 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.






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






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






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






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






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






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






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






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






46. 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)






47. One million ohms.






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






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






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