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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 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.






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

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3. 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.






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






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






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






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






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






9. 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.






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






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






13. The path of an electric current. To permit a steady flow of current - the path must be complete. Commonly - a complete circuit includes a device for the production of an electromotive force - connecting wires - and a device supplied with electricity.






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






15. 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.






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






34. 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






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






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






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

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






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






41. The unit of resistance. It is the resistance through which a voltage of 1 volt will produce a current of 1 ampere.






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






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






44. One- thousandth of volt.






45. The rotating member of an electrical machine.






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






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






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






49. The unit of Electro- Motive Force






50. One- thousandth of a ampere