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






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






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






4. The rotating member of an electrical machine.






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






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






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






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






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






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






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






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






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






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






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






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






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






19. 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.






20. An instrument for measuring electric current






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






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






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






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






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






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






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






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






29. A circuit carrying three alternating currents whose cycles begin one after another. 120 electrical degrees apart.






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






31. One millionth of an ohm.






32. A rate of movement of electrons through a conductor.






33. 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.






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






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






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






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






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






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






40. One million ohms.






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






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






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

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






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






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






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






48. 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.






49. 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






50. 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.