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






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






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






4. A unit of power.






5. Term applied to the loss of voltage in forcing current through any portion of a circuit. Different factors will cause a drop; material - size - (cross - sectional area) length - temperature.






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






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






8. One millionth of an ohm.






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






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






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






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






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






14. Lines representing the direction of the magnetic force in a magnetic field.






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






16. 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.






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






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






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






20. Negative charge of electricity






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






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






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






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






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






26. 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.


27. One- thousandth of a ampere






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






29. One millionth of an ampere.






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






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






32. Total and complete opposition to the flow of electrons






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






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






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






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






37. The rotating member of an electrical machine.






38. 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.






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






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






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






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






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






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






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






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






47. The unit of Electro- Motive Force






48. An instrument for measuring electric current






49. A measuring device.






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