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






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






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






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






5. 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.






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






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






8. 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.






9. Total and complete opposition to the flow of electrons






10. One millionth of a volt.






11. Opposition to current flow






12. 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)






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






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






15. A generator that produces alternating current.






16. 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.






17. One- thousandth of volt.






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






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






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






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






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






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






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






25. 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.






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






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






28. 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.






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






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






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


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






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






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






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






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






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






38. Occurs when a stream of electrons are caused to move through a conductor.






39. One million ohms.






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






41. A unit of power.






42. 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.


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






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






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






46. 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.






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






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






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






50. The unit of Electro- Motive Force