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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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

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19. 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.






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






21. Total and complete opposition to the flow of electrons






22. Opposition to current flow






23. 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.






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






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






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






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






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






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






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






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






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






33. 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.






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






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






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






37. 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.






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






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






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






41. 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.






42. 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.






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






44. One- thousandth of volt.






45. 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.






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






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






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






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






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







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