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






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






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






4. 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.






5. 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.






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

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7. Opposition to current flow






8. A measuring device.






9. 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.






10. 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)






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






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






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






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






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






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






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






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






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






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






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






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






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






26. One million ohms.






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






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






29. A generator that produces alternating current.






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






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






32. Total and complete opposition to the flow of electrons






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






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






36. (EMF) The force created by an electric generator (or by other means) which causes current to flow. (Same as Voltage - Volts - Electric Potential - Pressure).






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






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






39. A unit of power.






40. 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.






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






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






43. 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.






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






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






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






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






48. The electrodes of a cell shaped as plates to expose a surface as possible to the electrolyte.






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






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