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






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






3. A measuring device.






4. 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)






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






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






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






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






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






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






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






12. Total and complete opposition to the flow of electrons






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






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






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






16. A current limiting device designed to melt and break the circuit when a specified current is exceeded. (The weakest point in a circuit)






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






18. One- thousandth of volt.






19. One millionth of an ohm.






20. 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.






21. Opposition to current flow






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






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






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






25. One millionth of a volt.






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






27. 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.






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






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






30. One millionth of an ampere.






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






32. 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.






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






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






35. 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.






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






37. A circuit carrying three alternating currents whose cycles begin one after another. 120 electrical degrees apart.






38. 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.






39. 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.






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






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






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






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






44. 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.






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






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






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






48. 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.






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






50. An instrument for measuring electric current