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






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






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






4. An instrument for measuring electric current






5. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature






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






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






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






9. A measuring device.






10. The unit of Electro- Motive Force






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






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






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






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






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






16. 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.






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






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






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






20. A generator that produces alternating current.






21. One- thousandth of a ampere






22. Opposition to current flow






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






24. 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.






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






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






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






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






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






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






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






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






33. A resistor designed so that its resistance is readily adjusted.






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






35. 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.






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






37. 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.






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






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






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






41. 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.






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






43. One- thousandth of volt.






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






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






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






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






48. 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.






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






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