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






2. Invisible lines along which magnetic energy travels from one pole of a magnet to the other.






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






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






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






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






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






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






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






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






11. 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.






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






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






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






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






16. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field






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






18. One millionth of a volt.






19. An instrument for measuring electric current






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






21. A device which capacity is its chief electrical property; a device for storing or holding an electric charge; a capacitor.






22. Total and complete opposition to the flow of electrons






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






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






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






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






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






28. Negative charge of electricity






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


30. The path of an electric current. To permit a steady flow of current - the path must be complete. Commonly - a complete circuit includes a device for the production of an electromotive force - connecting wires - and a device supplied with electricity.






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






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






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






34. One millionth of an ohm.






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






36. Opposition to current flow






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






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






39. 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)






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






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






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






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






44. Lines representing the direction of the magnetic force in a magnetic field.






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






46. 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.






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






48. 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.






49. 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






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