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






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






3. 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.






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






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






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






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






8. An instrument for measuring electric current






9. A generator that produces alternating current.






10. One millionth of an ampere.






11. 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.






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






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






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






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






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






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






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






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






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






21. The rotating member of an electrical machine.






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

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






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






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






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






28. 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.






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






30. Opposition to current flow






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






32. The complete path through which the lines of force travel - leaving the north pole and re- entering the south pole.






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






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






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






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






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






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






39. The unit of Electro- Motive Force






40. A unit of power.






41. 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.






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






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






44. A unit of power; equal to 550 foot- pounds per second of approximately 746 watts.






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






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






47. Negative charge of electricity






48. 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






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






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