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






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






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






5. One millionth of an ampere.






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






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






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






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






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






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






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






13. A generator that produces alternating current.






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






15. 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.






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






17. 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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18. Meter used to measure resistance in an electrical circuit.






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






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






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






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






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






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

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






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






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






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






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






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






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






33. One- thousandth of volt.






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






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






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






37. Opposition to current flow






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






39. A measuring device.






40. Total and complete opposition to the flow of electrons






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






42. 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.






43. One millionth of a volt.






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. A coil of wire designed to act as a magnet as a result of carrying an electrical current. It is usually wound on a soft iron core.






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






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






48. 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.






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






50. 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.