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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. 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.






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






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






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






5. One- thousandth of a ampere






6. 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)






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






8. A generator that produces alternating current.






9. Those electrons in orbit nearest the nucleus - not easily dislodged from their normal orbits.






10. Invisible lines along which magnetic energy travels from one pole of a magnet to the other.






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






12. 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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13. A connection of circuit of low resistance. Current through each of the end- to- end devices is exactly the same. Only one path for the current.






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






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






16. Total and complete opposition to the flow of electrons






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






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






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






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






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






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

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






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






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






26. A measuring device.






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






28. Transformer coil connected to the load. (Output side of a transformer regardless of voltage).






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






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






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






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






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






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






35. 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.






36. 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.






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






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






39. 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.






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






41. Negative charge of electricity






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






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






44. One million ohms.






45. 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






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






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






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






49. One- thousandth of volt.






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