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






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






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






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






5. 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.






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






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






8. 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.






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






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






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






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






13. One million ohms.






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

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






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






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.






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






20. 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.






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






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






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






24. 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)






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






26. 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.






27. 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.






28. One- thousandth of volt.






29. 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






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






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. 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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33. Total and complete opposition to the flow of electrons






34. A coil of wire designed to act as a magnet as a result of carrying an electrical current. It is usually wound on a soft iron core.






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






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






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






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






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






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






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






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






43. One- thousandth of a ampere






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






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. 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.






47. Smallest part a substance can physically divided into composed of 2 or more atoms.






48. One millionth of an ampere.






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






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