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






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






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






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






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






6. The unit of Electro- Motive Force






7. A generator that produces alternating current.






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






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






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






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






12. An instrument for measuring electric current






13. A unit of power.






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






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






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






17. 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.






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






19. One million ohms.






20. A measuring device.






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






22. 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.






23. 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.






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






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






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






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






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

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






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






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






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






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






34. 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.






35. Negative charge of electricity






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






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






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






39. Opposition to current flow






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






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






42. 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.






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






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






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






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






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






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






50. 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.