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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 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






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






3. 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.






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






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






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






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






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






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






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






11. 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.






12. 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.






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






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






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






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






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






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






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






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






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






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






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






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






25. One million ohms.






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






27. A circuit with more than one path. Current branches to flow in every available path.






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






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






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






31. 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.






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






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






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






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






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






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






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






39. A unit of power.






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






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






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






43. Opposition to current flow






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






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






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






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






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






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






50. 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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