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Basic Electricity Vocab

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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 cell which is rechargeable. Uses materials which change in compostition during delivery of current - but may be restored to original condition upon recharge.






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






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






4. One million ohms.






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






6. 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.






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






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






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






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






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






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






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






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






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






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






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






18. The voltage dissipation between any two points in a circuit. The voltage 'dropped' or 'dissipated' in forcing current through a resistance.






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






20. One millionth of a volt.






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






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






24. One millionth of an ohm.






25. A measuring device.






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






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






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






29. One- thousandth of a ampere






30. A very low resistance path placed in a circuit in such a manner as to allow an excessive current flow.






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






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






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






34. 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.






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






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






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






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






39. 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.






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






41. 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.






42. Opposition to current flow






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






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






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






46. 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.






47. A unit of power.






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






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






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