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






2. A unit of power.






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






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






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






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






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






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






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






11. One- thousandth of volt.






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






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






14. One- thousandth of a ampere






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






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






17. An instrument for measuring electric current






18. The rotating member of an electrical machine.






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






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






21. A generator that produces alternating current.






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






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






24. 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)






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






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






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






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






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






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






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






33. One million ohms.






34. 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.






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






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






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






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






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






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






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






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






43. 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.






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






45. 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.






46. 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.






47. A material that has many free electrons thus allowing electric current to flow through it easily.






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






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






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