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






2. An instrument for measuring electromotive force in volts. It must be connected across the load that causes the votage drop.






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






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






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






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






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






8. 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.






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






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






11. 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.






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






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






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






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






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






17. A generator that produces alternating current.






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






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






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






21. 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)






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






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






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






25. One- thousandth of a ampere






26. The rotating member of an electrical machine.






27. One- thousandth of volt.






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






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






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






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






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






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






34. 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






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






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






37. 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.






38. An instrument for measuring electric current






39. 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.






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






41. One millionth of an ohm.






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






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






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






45. The voltage dissipation between any two points in a circuit. The voltage 'dropped' or 'dissipated' in forcing current through a resistance.






46. 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.






47. Negative charge of electricity






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






49. 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.






50. One million ohms.