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






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






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






4. 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.






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






6. Negative charge of electricity






7. A unit of power.






8. One- thousandth of a ampere






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






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






11. Hardened steel which has been magnetized artificially and which retains its magnetic properties






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






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






14. 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.






15. One- thousandth of volt.






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






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






18. 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)






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






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






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






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






23. Any device which may be placed in the circuit and which offers opposition to the flow of electrons around the circuit.






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






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






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


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






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






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






30. The unit of Electro- Motive Force






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






32. Opposition to current flow






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






34. One millionth of an ampere.






35. 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.






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






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






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






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. The rotating member of an electrical machine.






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






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






43. A measuring device.






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






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






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






47. 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.






48. Lines representing the direction of the magnetic force in a magnetic field.






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






50. One millionth of an ohm.