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






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






3. 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.






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






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






6. Negative charge of electricity






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






8. Total and complete opposition to the flow of electrons






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






10. A measuring device.






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






12. The process of producing an electromotive force in a conductor as a result of the cutting of magnetic lines of force by a conductor.






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






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






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






16. A material which CANNOT be magnetized. Example: Wood - Glass - Brass - Rubber...






17. 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.






18. The rotating member of an electrical machine.






19. One millionth of a volt.






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


21. 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.






22. A generator that produces alternating current.






23. 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.






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






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






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


27. The property of a material that opposes the flow of current.






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






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






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






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






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






33. The unit of Electro- Motive Force






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






35. 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






36. One million ohms.






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






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






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






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






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






42. 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.


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






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






45. One millionth of an ampere.






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






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






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






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






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