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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. One millionth of an ohm.






2. 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)






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






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






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






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






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






8. Negative charge of electricity






9. One- thousandth of volt.






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






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






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






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






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






15. Opposition to current flow






16. 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.






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






18. One million ohms.






19. 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.






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






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






22. One- thousandth of a ampere






23. 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.






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

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25. 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.






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






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






28. An instrument for measuring electric current






29. 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






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






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






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






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






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






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






36. A generator that produces alternating current.






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






39. The rotating member of an electrical machine.






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






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






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






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






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






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






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






47. 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.






48. One millionth of an ampere.






49. Total and complete opposition to the flow of electrons






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