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






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






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






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






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






6. The unit of Electro- Motive Force






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






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






9. Opposition to current flow






10. One million ohms.






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






12. 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.






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






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






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






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






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






18. One- thousandth of volt.






19. 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.






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






21. One millionth of an ohm.






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






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






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






25. 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.






26. 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.






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






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






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






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






31. Iron and certain alloys of iron which are magnetized by artificial means.






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






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






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






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






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






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






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






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






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






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






42. 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.






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






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






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






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






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






48. 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.






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






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