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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 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.






2. One- thousandth of a ampere






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






4. Negative charge of electricity






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






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






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






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






9. 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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10. 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.






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






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






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






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






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






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






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






18. 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)






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






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






21. One millionth of an ohm.






22. One- thousandth of volt.






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






24. Opposition to current flow






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






26. 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.






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






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

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29. 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.






30. 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.






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






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






33. A generator that produces alternating current.






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






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






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






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






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






39. 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






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






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






42. The unit of Electro- Motive Force






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






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






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






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






47. 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.






48. An instrument for measuring electric current






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






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