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






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






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






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






5. A generator that produces alternating current.






6. 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.






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






8. 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.






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






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






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






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






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






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






15. Total and complete opposition to the flow of electrons






16. One millionth of an ohm.






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






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


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






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






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






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






24. Iron and certain alloys of iron which are magnetized by artificial means.






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






26. 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)






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






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






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






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






31. An alternating current which current cycle begins later that its voltage cycle.






32. One millionth of an ampere.






33. 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.






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






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






36. 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






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






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






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






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






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






42. 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.






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






44. Opposition to current flow






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






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






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






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






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






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