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






2. One millionth of an ohm.






3. Total and complete opposition to the flow of electrons






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






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






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






7. A resistor designed so that its resistance is readily adjusted.






8. One million ohms.






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






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






11. One millionth of a volt.






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






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






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






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






16. The rotating member of an electrical machine.






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






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






19. A unit of power.






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






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






22. One- thousandth of a ampere






23. An alternating current which current cycle begins earlier than its voltage cycle.






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






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






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






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






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






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






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






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






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






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






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






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






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

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






39. 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.






40. One millionth of an ampere.






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






42. 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.






43. 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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44. 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.






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






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






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






48. The unit of Electro- Motive Force






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






50. 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.