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






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






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






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






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






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

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






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






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






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






11. 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.






12. 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.






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






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






15. One millionth of an ampere.






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






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






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






19. 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)






20. The opposite ends of a magnet where the magnetism is concentrated. Each magnet has two poles - designated as north and south.






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






22. 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.






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






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






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






26. An instrument for measuring electric current






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






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






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






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






31. The rotating member of an electrical machine.






32. One- thousandth of a ampere






33. One- thousandth of volt.






34. One millionth of an ohm.






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






36. One million ohms.






37. Opposition to current flow






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






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






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






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






42. 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.






43. 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.






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






46. A measuring device.






47. 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






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






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






50. One millionth of a volt.