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






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






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






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






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






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






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






8. 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.






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






10. 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.






11. 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)






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






13. One- thousandth of a ampere






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






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






16. A generator that produces alternating current.






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






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






19. 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.






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






21. A measuring device.






22. 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.






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






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






25. A unit of power.






26. 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.






27. One millionth of an ampere.






28. 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.






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






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






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






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






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






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






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






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






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






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






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

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






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






42. One- thousandth of volt.






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






44. 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.






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






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






47. One millionth of a volt.






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






49. The rotating member of an electrical machine.






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