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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 measuring device.






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






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






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






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






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






7. 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.






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






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






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






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






12. A generator that produces alternating current.






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






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


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






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






17. 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.


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






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






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






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






22. One million ohms.






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






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






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






26. 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.






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






28. Total and complete opposition to the flow of electrons






29. 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.






30. One millionth of a volt.






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






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






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






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






35. Positive charge of electricity. Located in the nucleus of the atom.






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






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






38. Opposition to current flow






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






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






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






42. One- thousandth of a ampere






43. One millionth of an ohm.






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






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






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






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






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






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






50. The unit of Electro- Motive Force