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






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






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






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






5. A measuring device.






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






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






8. 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.






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






10. 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.






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






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






13. 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.






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






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






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






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






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






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






20. One millionth of a volt.






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






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






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






24. 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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25. 1.Speed of conductors cutting lines of force 2.Strength of the magnetic field 3.Length of conductors cutting through the field






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






27. One millionth of an ampere.






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






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






30. Opposition to current flow






31. 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.






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






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






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






35. The rotating member of an electrical machine.






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






37. 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






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






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. A generator that produces alternating current.






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






42. A very low resistance path placed in a circuit in such a manner as to allow an excessive current flow.






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






44. A circuit with two or more paths for the current to take.






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






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






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






48. 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.






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






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







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