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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 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.






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






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






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






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






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






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






8. 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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9. A resistor designed so that its resistance is readily adjusted.






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






11. 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.






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






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






14. One millionth of an ohm.






15. Negative charge of electricity






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






17. The unit of Electro- Motive Force






18. One- thousandth of a ampere






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






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






21. A complete sequence of events - as an alternating- current cycle.






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






23. 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.






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






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






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






27. 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.






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






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






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






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






33. The magnetism which a material retains after the magnetic force which magnetized it has been removed.






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






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






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






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






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






39. One million ohms.






40. 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.






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

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42. 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.






43. The rotating member of an electrical machine.






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






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






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






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






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

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






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