Test your basic knowledge |

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






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






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






4. One million ohms.






5. The unit of Electro- Motive Force






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






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






8. An instrument for measuring electric current






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






10. 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.






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






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






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






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






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






16. 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.






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






18. Those electrons in orbit nearest the nucleus - not easily dislodged from their normal orbits.






19. 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






20. One millionth of an ampere.






21. One- thousandth of volt.






22. Total and complete opposition to the flow of electrons






23. 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)






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






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






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






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






28. 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.


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






30. 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.






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


32. 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.






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






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






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






36. A cell which is rechargeable. Uses materials which change in compostition during delivery of current - but may be restored to original condition upon recharge.






37. Opposition to current flow






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






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






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






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






42. A measuring device.






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






44. One millionth of an ohm.






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






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






47. A unit of power; equal to 550 foot- pounds per second of approximately 746 watts.






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






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






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