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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 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.






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






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






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






5. 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)






6. An instrument for measuring electric current






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






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






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






10. 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.






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






12. One millionth of an ampere.






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






14. One million ohms.






15. Total and complete opposition to the flow of electrons






16. An alternating current which current cycle begins later that its voltage cycle.






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






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






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

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






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






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






23. 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.






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






25. A generator that produces alternating current.






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






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






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






29. 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.






30. The opposite ends of a magnet where the magnetism is concentrated. Each magnet has two poles - designated as north and south.






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






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






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






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






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






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






37. Opposition to current flow






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






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






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






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






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






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






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






45. A measuring device.






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






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






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






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






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