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






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






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






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






5. 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.






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






7. 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






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






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






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






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






12. 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.






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






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






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






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






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






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






19. The electrodes of a cell shaped as plates to expose a surface as possible to the electrolyte.






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

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






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






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






25. A connection of circuit of low resistance. Current through each of the end- to- end devices is exactly the same. Only one path for the current.






26. An instrument for measuring electric current






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






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






29. One millionth of an ampere.






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






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






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






33. 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.






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






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






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






37. 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)






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






39. 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.






40. One million ohms.






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






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






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






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






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






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






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






48. A material with few free electrons. A structure or material used to prevent the passage of current.






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






50. 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.







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