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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 which can be magnetized - principally iron.






2. That property of a material which determines how readily it conducts magnetic lines of flux. Opposite magnetic quality or conductivity.






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






4. 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.






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






6. One- thousandth of a ampere






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






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






9. 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.






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






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






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






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






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






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






16. 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.






17. A generator that produces alternating current.






18. 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.






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






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






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






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






23. 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.






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






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






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






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






28. 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






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






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






31. An instrument for measuring electric current






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






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






34. The dissimilar metals which are placed in an electrolyte to form a cell.






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






36. The rotating member of an electrical machine.






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






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






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






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






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






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






43. One million ohms.






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






45. 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.






46. 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)






47. 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.






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

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






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