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






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






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






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






5. 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.






6. A material which CANNOT be magnetized. Example: Wood - Glass - Brass - Rubber...






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






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






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






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






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






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

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






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






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






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






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






18. Negative charge of electricity






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






20. 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.






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






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






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






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






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






26. One millionth of an ampere.






27. 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






28. One millionth of a volt.






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






30. 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.






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






32. 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.






33. A generator that produces alternating current.






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






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






36. A circuit with two or more paths for the current to take.






37. A unit of power.






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






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






40. A cell which is rechargeable. Uses materials which change in compostition during delivery of current - but may be restored to original condition upon recharge.






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






42. The rotating member of an electrical machine.






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






44. One million ohms.






45. 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.






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






47. 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.






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






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






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