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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 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.






2. An alternating current which current cycle begins later that its voltage cycle.






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






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






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






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






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






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






9. 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.






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






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






12. 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.






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






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






15. 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)






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






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






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






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






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






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






22. The unit of Electro- Motive Force






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






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






25. The time rate at which work is done or energy is transferred. When a pressure of 1 volt sends a current of 1 ampere through a resistance of 1 ohm - the power in the circuit is said to be 1 watt.






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






27. One- thousandth of volt.






28. The rotating member of an electrical machine.






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






30. Negative charge of electricity






31. 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.






32. A generator that produces alternating current.






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






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






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






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






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






38. 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.






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. 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.


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






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






43. One millionth of an ohm.






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


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






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






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






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






49. Opposition to current flow






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