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






2. 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.






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






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






5. 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.






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






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






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






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






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






11. 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.






12. One- thousandth of a ampere






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

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






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






16. 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.






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






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






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






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






21. 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






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






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






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






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






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






27. An instrument for measuring electrical power. Most common use: The meter of your house to measure electrical consumption.






28. One- thousandth of volt.






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






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






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






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. The unit of Electro- Motive Force






34. One million ohms.






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






36. The rotating member of an electrical machine.






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






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






40. 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.






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






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






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






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






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






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






47. 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)






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






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






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