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






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






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






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






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






6. One- thousandth of a ampere






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






8. 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.


9. Total and complete opposition to the flow of electrons






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






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






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






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






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






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






16. One million ohms.






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






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






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






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






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






22. Negative charge of electricity






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






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


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






26. One millionth of a volt.






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






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






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






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






31. 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.






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






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






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






35. 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.






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






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






38. 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.






39. 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






40. One millionth of an ampere.






41. A measuring device.






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






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






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






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






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






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






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






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






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