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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 generator that produces alternating current.






2. 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






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






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






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






6. Opposition to current flow






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






8. Those electrons in orbits farthest out from the nucleus - loosely bound and migrate from one atom to another.






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






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






11. One millionth of an ohm.






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






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






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






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






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






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






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






19. A unit of power.






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

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21. 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.






22. One million ohms.






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






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






25. Total and complete opposition to the flow of electrons






26. 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.






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






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






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






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






31. Negative charge of electricity






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






33. One millionth of an ampere.






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






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






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






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






39. Positive charge of electricity. Located in the nucleus of the atom.






40. 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.






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






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






44. 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.






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






46. An instrument for measuring electric current






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






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






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






50. 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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