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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. 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.






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






3. The unit of electromotive force - potential - pressure - or voltage which produces a current of one ampere in a circuit having a resistance of 1 ohm. This is the force created to move electrons through a circuit.






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






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






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






7. 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.






8. A unit of POWER. 1 kilowatt = 1 -000 watts






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






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






11. One million ohms.






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






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






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






15. The rotating member of an electrical machine.






16. 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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17. Meter used to measure resistance in an electrical circuit.






18. 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.






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






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






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






22. 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.






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






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






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






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






27. 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.






28. Total and complete opposition to the flow of electrons






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






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






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






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






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






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






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






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






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






39. One millionth of an ampere.






40. Hardened steel which has been magnetized artificially and which retains its magnetic properties






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






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






43. One- thousandth of a ampere






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






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

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






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






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






49. 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.






50. Opposition to current flow