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






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






3. A unit of power.






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






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






7. A measuring device.






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






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






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






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






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






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






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






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






16. One millionth of an ampere.






17. A short circuit between two energized conductors and/or an energized conductor and a grounded phase. Very high current flow.

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18. 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)






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






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






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






22. 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






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






24. 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.






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






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






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






28. Total and complete opposition to the flow of electrons






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






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

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






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






33. An instrument for measuring electric current






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






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






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






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






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






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






40. The unit of Electro- Motive Force






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






42. 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.






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






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






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






46. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature






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






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






49. 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.






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