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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. Meter used to measure resistance in an electrical circuit.






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






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






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






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






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






7. A measuring device.






8. One- thousandth of a ampere






9. One- thousandth of volt.






10. A short circuit between two energized conductors and/or an energized conductor and a grounded phase. Very high current flow.


11. One millionth of a volt.






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






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. Opposition to current flow






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






16. One millionth of an ampere.






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






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






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






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






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






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






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






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






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






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






29. 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.


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






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






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






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






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






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






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






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






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






39. 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






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






41. 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.






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






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






44. 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.






45. 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.






46. Total and complete opposition to the flow of electrons






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






49. 1.Material itself (Atomic Structure - Good conductor or Bad) 2.Length of the conductor 3.Cross - sectional area (Size) 4.Temperature






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