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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 property of a material that opposes the flow of current.






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






3. One million ohms.






4. 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.






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

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6. 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






7. 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.






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






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






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






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






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






13. An instrument for measuring electric current






14. The unit of Electro- Motive Force






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






16. 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.






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






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






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






20. 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.






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






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






23. Invisible lines along which magnetic energy travels from one pole of a magnet to the other.






24. A generator that produces alternating current.






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






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






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






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






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






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






31. The liquid solution (sometime a paste) in which the electrodes are placed.






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






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






34. Any of the spaces occupied by the orbits of a group of electrons of approximately equal energy surronding the nucleus of an atom.






35. One millionth of an ohm.






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






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






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






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






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






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

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






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






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






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






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






48. A measuring device.






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






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