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






2. 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






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






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






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






6. 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)






7. 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.






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






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






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






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






13. 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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14. One millionth of a volt.






15. One- thousandth of a ampere






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






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






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






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






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






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






23. Opposition to current flow






24. 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.






25. One- thousandth of volt.






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






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






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






29. Term applied to the loss of voltage in forcing current through any portion of a circuit. Different factors will cause a drop; material - size - (cross - sectional area) length - temperature.






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






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






32. A measuring device.






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






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






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






36. Total and complete opposition to the flow of electrons






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






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






39. 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.






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






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






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






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






44. The unit of Electro- Motive Force






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






46. 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.






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






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






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






50. 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.